Hello, I’d like to clarify the technical limitations around app updates in an Apple School Manager (ASM) + MDM environment. Environment • iOS/iPadOS devices supervised and managed via Apple School Manager • Apps are distributed via ASM (VPP / Custom App) and managed by MDM • Apps are App Store–signed (not Enterprise/In-House) • Some apps include NetworkExtension (VPN) functionality • Automatic app updates are enabled in MDM Question From a technical and platform-design perspective, is it possible to: Deploy app updates for ASM/MDM-distributed App Store apps via a separate/custom update server, and trigger updates simultaneously across all managed devices, bypassing or supplementing the App Store update mechanism? In other words: • Can an organization operate its own update server to push a new app version to all devices at once? • Or is App Store + iOS always the sole execution path for installing updated app binaries? ⸻ My current understanding (please correct if wrong) Based on Apple documentation, it seems that: 1. App Store–distributed apps cannot self-update • Apps cannot download and install new binaries or replace themselves. • All executable code must be Apple-signed and installed by the system. 2. MDM can manage distribution and enable auto-update, but: • MDM cannot reliably trigger an immediate update for App Store apps. • Actual download/install timing is decided by iOS (device locked, charging, Wi-Fi, etc.). 3. Custom update servers • May be used for policy decisions (minimum allowed version, feature blocking), • But cannot be used to distribute or install updated app binaries on iOS. 4. For ASM-managed devices: • The only supported update execution path is: App Store → iOS → Managed App Update • Any “forced update” behavior must be implemented at the app logic level, not the installation level. ⸻ What I’m trying to confirm • Is there any supported MDM command, API, or mechanism that allows: • Centralized, immediate, one-shot updates of App Store apps across all ASM-managed devices? • Or is the above limitation fundamental by design, meaning: • Organizations must rely on iOS’s periodic auto-update behavior • And enforce version compliance only via app-side logic? ⸻ Why this matters In large school deployments, delayed updates (due to device conditions or OS scheduling) can cause: • Version fragmentation • Inconsistent behavior across classrooms • Operational issues for VPN / security-related apps Understanding whether this limitation is absolute or if there is a recommended Apple-supported workaround would be extremely helpful. Thanks in advance for any clarification

Hi, I might be a bit late to the party, but Apple has added several SkipKeys such as: TapToSetup and SafetyAndHandling. I want to make sure that the keys is working properly, so I want to do the before-after comparison, however I just can't seem to show pages related to those keys. Just for information, I'm based in Japan and I've been using iPhone pro 16 and M2 iPad Pro for the testing. I believe that TapToSetup is apple tv-related, so I've tried various things such as having it in a same network or using the same apple account both in Apple TV and the iPhone/iPad but I can't get it to show. Any ideas?

Hello All, I come to ask a question that I haven't been able to find the docs. I continue to work on implementing declarative management and while working there is a question/concern I have. I have noticed that during some destructive testing, if the device is attempting to fetch a configuration and the server responds with a 503 (or any server related error) then the device will wipe all configurations and attempt to reapply them. Is there any way to prevent this by intercepting status codes or would the only real solution be to force down a temp/test config if the real config can't be fetched from the server?

Hi Team, Could you please share how to change/extend the expiry date of the existing iOS Distribution (In-House) certificate? Since the membership renewal date is in March 2026 and the iOS distribution(In-House) certificate expiry date is in Feb 2026. We use to distribute the mobile apps using the product intunes (Company portal) and via direct download link. Please suggest since this certificate is used by multiple mobile apps by the users which can affect lot of iPhone users? Thank you in advance Deepak

I am trying to correctly manage about 20 Mac, iPhones and PC inside a Wi-Fi network built through System Settings > Sharing > Internet Sharing To achieve this task I defined a complete configuration file: /etc/bootpd.plist which is used by /usr/libexec/InternetSharing. But every time /usr/libexec/InternetSharing is starting the file /etc/bootpd.plist is overwritten by another file and my configuration is thus fully lost. How to set a correct /etc/bootps.plist file and avoid its total overwrite by /usr/libexec/InternetSharing? Is it necessary to write this bootpd.plist in some other directory for /usr/libexec/InternetSharing to load it without destroying it? I got the same configuration total erase on macOS Big Sur and Sequoia.

Hello, I am trying to authenticate to the Apple Business Manager API to retrieve device information and ingest it into ServiceNow. I am following the documentation here. The first step is to create an API account and download the private key used to create a JWT client assertion. The guide linked above gives a python script to create a client assertion. Below the first python script, the following description is given for the "kid" variable: "The value is your keyId that returns when you upload a public key." This is the first time that a public key, rather than a private key, is referenced. Where is the public key supposed to be uploaded? Later in the guide, a public key is referenced again, in the section describing the client_id Request parameter: "(Required) You receive your clientId when you upload a public key." I have tried to create a client assertion using the keyId that is associated with the API account. When I try to request an access token, however, I also get an "invalid_client" error back. I am wondering if I'm using the wrong values for both key_id and client_id due to not creating and uploading a public key. Any help would be appreciated, thanks!

Hi, I’m testing the ClearPasscode MDM command: https://developer.apple.com/documentation/devicemanagement/clear-passcode-command Question: If a user enters the passcode incorrectly multiple times and the device becomes temporarily locked (e.g., “Try again in X minutes”) or reaches “Security Lockout”, can ClearPasscode still be executed successfully while the device is in that state? {'ErrorCode': 5013, 35708 'ErrorDomain': 'MCPasscodeErrorDomain', 35709 'LocalizedDescription': '\xe3\x81\x93...x89', 35710 'USEnglishDescription': 'The passcode cannot be cleared (-1)'} If it depends on conditions (e.g., supervised vs. user enrollment, availability of UnlockToken, network/check-in state), could you clarify which conditions are required? Thank you.

We are upgrading macOS (minor versions and potentially major versions) using a scripted approach: Install the InstallAssistant package via installer Trigger OS install via startosinstall On MDM-managed assets, OS update policies appear to prohibit or interfere with the update flow. The update often fails with startosinstall reporting “Helper tool crashed…” during the “Preparing” phase. Steps to Reproduce On an MDM-enrolled Mac with OS update restriction/deferral policies applied, run: sudo /usr/sbin/installer -pkg /Path/To/InstallAssistant.pkg -target / && echo 'MACOS_PASSWORD' | /Applications/Install\ macOS\ Sonoma.app/Contents/Resources/startosinstall --agreetolicense --forcequitapps --stdinpass --user MACOS_USER Actual Result Package installation reports success, but startosinstall fails during preparation with: Standard Output installer: Package name is macOS15.7_SoftwareUpdate installer: Upgrading at base path / installer: The upgrade was successful. By using the agreetolicense option, you are agreeing that you have run this tool with the license only option and have read and agreed to the terms. If you do not agree, press CTRL-C and cancel this process immediately. Preparing to run macOS Installer... Preparing: 0.0% Preparing: 0.1% ... Preparing: 24.9% Standard Error Helper tool crashed... notes.log Install.log is also attached. Questions for Apple / Ask: We suspect this crash is caused by MDM OS update restrictions/policies. We need Apple’s recommended method to perform macOS updates (minor + major) when MDM is present, especially in environments where update deferrals/restrictions may be configured.

Background / Objective We are currently developing a solution to centrally manage Apple OS updates (major and minor) across managed macOS devices. Before implementing at scale, we need Apple’s guidance on supported and future-proof update mechanisms under MDM. Questions / Ask (Apple Guidance Requested) Apple recommended method What is Apple’s recommended approach to perform: Minor updates (e.g., macOS X.Y → X.Z) Major upgrades (e.g., Ventura → Sonoma) in an enterprise fleet? Support boundary Is macOS update management only supported via MDM (including any newer declarative workflows), or are local mechanisms (installer + command-line tooling) also considered supported for enterprise automation? Use of startosinstall Can we leverage the existing utility: /Applications/Install macOS .app/Contents/Resources/startosinstall for automated upgrades in enterprise environments? If yes, are there recommended flags/workflows Apple endorses for unattended or minimally interactive upgrades? Long-term support / stability Does startosinstall have any form of long-term support / stability guarantees across future macOS releases? Are there any known deprecations planned (or guidance that customers should transition to MDM/DDM workflows)? MDM interaction / interference When using startosinstall, can MDM policies (software update deferrals/restrictions, update enforcement, etc.) interfere with or block the upgrade? If interference is expected, what is the correct supported way to coordinate: MDM software update settings local startosinstall execution to avoid failures and ensure compliance? What We Need From Apple (Desired Outcome) A clear statement of recommended and supported update workflow(s) for enterprise managed macOS: for minor updates for major upgrades Guidance on whether startosinstall is acceptable for long-term automation, or whether we should only use MDM/DDM-driven workflows. Any best practices or reference documentation Apple recommends for implementing this safely and reliably.

I've been running the betas fine for a while, now, where do you want to go??

Hi, We're having problems starting an Ad Hoc ipa on an iPad with iOS 12.7.7 and 12.7.8, probably iOS 12 in general. The iPad's UUID is added to the certificate. And we don't have problems with iOS versions > iOS 12. Here is the anonymized Console Log: default 09:05:12.088994+0100 SpringBoard immediate edge swipe: failed default 09:05:12.095189+0100 SpringBoard Icon touch began: <private> default 09:05:12.096204+0100 SpringBoard Found a reasonable launch image for <private>, not pre-warming SplashBoard. Load image into the snapshot instance. default 09:05:12.117737+0100 powerd Activity changes from 0x2 to 0x1. UseActiveState:1 default 09:05:12.118572+0100 powerd hidActive:1 displayOff:0 assertionActivityValid:0 now:0xcb6 hid_ts:0xcb6 assertion_ts:0x0 default 09:05:12.145354+0100 backboardd [HID] [MT] dispatchEvent Dispatching event with 1 children, _eventMask=0x23 _childEventMask=0x3 Cancel=0 Touching=0 inRange=0 default 09:05:12.152820+0100 SpringBoard Icon tapped: <private> default 09:05:12.158236+0100 dasd Trigger: <private> is now [1] default 09:05:12.159538+0100 dasd Don't have <private> for type 1 default 09:05:12.170128+0100 trustd cert[0]: SubjectCommonName =(leaf)[]> 0 default 09:05:12.170407+0100 trustd cert[0]: LeafMarkerOid =(leaf)[]> 0 default 09:05:12.182388+0100 trustd OCSPSingleResponse: nextUpdate 0.54 days ago default 09:05:12.186084+0100 trustd OCSPSingleResponse: nextUpdate 0.62 days ago default 09:05:12.187067+0100 SpringBoard Trust evaluate failure: [leaf IssuerCommonName LeafMarkerOid SubjectCommonName] default 09:05:12.238604+0100 trustd Task <TASK_UUID_REDACTED_1>.<1> resuming, QOS(0x19) default 09:05:12.240650+0100 trustd TIC TCP Conn Start [12:0xADDR_REDACTED] default 09:05:12.241136+0100 trustd [C12 Hostname#HASH_REDACTED:80 tcp, pid: PID_REDACTED, url hash: HASH_REDACTED] start default 09:05:12.245884+0100 trustd TIC TCP Conn Start [13:0xADDR_REDACTED] default 09:05:12.246361+0100 trustd [C13 Hostname#HASH_REDACTED:80 tcp, pid: PID_REDACTED, url hash: HASH_REDACTED] start default 09:05:12.256520+0100 trustd nw_connection_report_state_with_handler_locked [C12] reporting state failed error Network is down error 09:05:12.256978+0100 trustd TIC TCP Conn Failed [12:0xADDR_REDACTED]: 1:50 Err(50) error 09:05:12.262697+0100 trustd Task <TASK_UUID_REDACTED_1>.<1> HTTP load failed (error code: -1009 [1:50]) error 09:05:12.271646+0100 trustd Task <TASK_UUID_REDACTED_1>.<1> load failed with error Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." default 09:05:12.271898+0100 trustd Failed to download ocsp response http://ocsp.apple.com/ocsp03-wwdrg311/... with error Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." default 09:05:12.280643+0100 SpringBoard Activating <private> from icon default 09:05:12.281399+0100 CommCenter #I CTServerConnection from pid PID_REDACTED has closed (conn=0xADDR_REDACTED) default 09:05:12.513629+0100 SpringBoard Bootstrapping com.example.myapp with intent foreground-interactive default 09:05:12.514084+0100 assertiond Submitting new job for "com.example.myapp" on behalf of <BKProcess: 0xADDR_REDACTED; SpringBoard; com.apple.springboard; pid: PID_REDACTED; ...> default 09:05:12.514909+0100 assertiond Submitted job with label: UIKitApplication:com.example.myapp[REDACTED][REDACTED] error 09:05:12.516769+0100 SpringBoard [com.example.myapp] Bootstrap failed with error: <NSError: 0xADDR_REDACTED; domain: BKSProcessErrorDomain; code: 1 (bootstrap-failed); reason: "Failed to start job"> error 09:05:12.516935+0100 SpringBoard Bootstrapping failed for <FBApplicationProcess: 0xADDR_REDACTED; com.example.myapp; pid: -1> with error: Error Domain=BKSProcessErrorDomain Code=1 "Unable to bootstrap process with bundleID com.example.myapp" default 09:05:12.517589+0100 SpringBoard <FBApplicationProcess: 0xADDR_REDACTED; com.example.myapp; pid: -1> exited. default 09:05:12.542638+0100 SpringBoard Application process state changed for com.example.myapp: <SBApplicationProcessState: 0xADDR_REDACTED; pid: -1; taskState: Not Running; visibility: Unknown> default 09:05:13.072994+0100 SpringBoard Front display did change: <SBApplication: 0xADDR_REDACTED; com.example.myapp> Is there any know problem with running Ad Hoc ipas on iOS 12? Thanks Christian

Hi, We're having problems starting an Ad Hoc ipa on an iPad with iOS 12.7.7 and 12.7.8. The iPad's UUID has been added to the provisioning profile. The iPad that we are trying to start the app on is online, so Apple's certificate validation server should be reachable. We don't have any problems with iOS versions above iOS 12. The .ipa was built using the latest version of Xcode (26.2, build 17C52). Here is the anonymised and reduced console log (only the app launch / bootstrap part): default 07:29:35.683108+0100 SpringBoard Icon touch began: <private> default 07:29:35.752640+0100 SpringBoard Icon tapped: <private> default 07:29:35.768538+0100 trustd cert[0]: SubjectCommonName =(leaf)[]> 0 default 07:29:35.791500+0100 SpringBoard Trust evaluate failure: [leaf IssuerCommonName LeafMarkerOid SubjectCommonName] default 07:29:35.793654+0100 trustd cert[0]: IssuerCommonName =(path)[]> 0 default 07:29:36.043497+0100 assertiond Submitting new job for "<APP_BUNDLE_ID>" on behalf of SpringBoard (pid: 48) default 07:29:36.044393+0100 SpringBoard Bootstrapping <APP_BUNDLE_ID> with intent foreground-interactive error 07:29:36.045124+0100 SpringBoard [<APP_BUNDLE_ID>] Bootstrap failed with error: domain: BKSProcessErrorDomain, code: 1 (bootstrap-failed), reason: "Failed to start job" error 07:29:36.045214+0100 SpringBoard Bootstrapping failed for <APP_BUNDLE_ID> (pid: -1): Error Domain=BKSProcessErrorDomain Code=1 "Unable to bootstrap process with bundleID <APP_BUNDLE_ID>" NSLocalizedFailureReason=Failed to start job NSUnderlyingError=NSPOSIXErrorDomain Code=3 "No such process" BKLaunchdOperation=launch_get_running_pid_4SB BKLaunchdJobLabel=<LAUNCHD_JOB_LABEL> BKSProcessJobLabel=<LAUNCHD_JOB_LABEL> default 07:29:36.046078+0100 assertiond Submitted job with label: <LAUNCHD_JOB_LABEL> default 07:29:36.046442+0100 assertiond Unable to get pid for '<LAUNCHD_JOB_LABEL>': No such process (3) error 07:29:36.046542+0100 assertiond Failed to start job: NSPOSIXErrorDomain Code=3 "No such process" default 07:29:36.046607+0100 assertiond Deleted job with label: <LAUNCHD_JOB_LABEL> default 07:29:36.081068+0100 SpringBoard Application process state changed for <APP_BUNDLE_ID>: pid: -1; taskState: Not Running

Hello everyone, I’m looking for some clarity from the community regarding eligibility for the Swift Student Challenge 2026, particularly for students taking a gap year in India. I graduated from high school (Class XII, CBSE – India) in May 2025. After graduating, I chose to take a gap year to prepare for competitive entrance examinations in India, with the goal of pursuing Computer Science / Engineering. I’ll be applying to accredited universities for programs starting in mid-2026, and I’m not currently enrolled in a college. My question: The eligibility guidelines state that high school graduates must have graduated within the past 6 months and must be awaiting acceptance or have received acceptance to an accredited institution. Since the submission deadline is February 28, 2026, my graduation would be about 9 months prior, which puts me in a gray area. Has anyone here participated in, or seen others participate in, the Swift Student Challenge while taking a gap year and preparing for university entrance exams? Is there any known flexibility or precedent for students in this situation? I’ve been following the Swift Student Challenge since 2023 and would really love to participate if I’m eligible. Any insights or experiences would be greatly appreciated. Thanks!

Hey folks, I work as a software development consultant. We develop enterprise applications for our clients, and the apps we create are usually for internal use. We've ran into a bit of a conundrum with a client who doesn't have their own Apple Enterprise account, and neither do we as we don't meet the criteria, but they're wanting to distribute an application we've built for them via their own MDM software. We are not entirely sure how to provide them with a distribution ready .ipa file that isn't AdHoc and will be recognized as a secure app. We've looked into generating a Developer ID provisioning profile and accompanying cert, however we're running into a problem where the platform of our app (iOS) doesn't match the platform required by the Developer ID profile (macOS). I've also come across the idea of resigning an .ipa, but again, the client doesn't have a Apple Developer account and expects the working .ipa to be included in the service rendered. Any suggestions or advice or documentation around the subject would be greatly appreciated. Thanks, Ale

Hello everyone, I am looking for technical clarification regarding potential rate limits when automating frequent iOS device resets. In my workflow, I need to reset test devices multiple times per day using the EraseDevice MDM command, often combined with the ReturnToService flag for automated setup. I understand that after a full reset, the device undertakes several critical steps to become operational again, including device activation, system app installation, MDM re-enrollment, and subsequent validation of developer certificates for internally distributed apps. Based on Apple’s documentation and my own observations, I am aware of the following domains being involved in these processes: Device Activation: albert.apple.com, gs.apple.com, captive.apple.com, humb.apple.com, static.ips.apple.com, sq-device.apple.com, tbsc.apple.com, time*.apple.com System App Installation: *.itunes.apple.com, *.apps.apple.com, *.mzstatic.com MDM Enrollment: Communication with Apple ADE servers followed by the MDM server. Developer Certificate Validation: ppq.apple.com, ocsp.apple.com, crl.apple.com My primary question is: Are there any rate limits imposed by Apple’s servers on these specific processes when performed frequently on the exact same device within a short timeframe (e.g., multiple times per day)? Specifically, could anyone provide information regarding potential limits for: Device activation requests? System app downloads post-activation? Automated Device Enrollment checks and subsequent MDM enrollments? Developer certificate validation requests? Additionally, is the list of domains above comprehensive for these processes, or are there other key endpoints involved that I should be aware of regarding potential rate limiting? Understanding these limitations is crucial for ensuring the reliability of automated device management workflows. Thank you for any insights!

We are moving to Apple Business Store for our b2b customers. On the "residential" apple store side there is testflight. What process would one test an app we provide to a b2b customer when using apple business store publishing? (I don't see any sort of test flight for apple business)

I have a question regarding MDM functionality for iOS/iPadOS. Background: According to Apple's support page(https://support.apple.com/en-us/125073), since iOS 26.1, "Previous Wi-Fi configurations will be replaced when a new profile is installed." We have observed that because of this change, when we apply a Wi-Fi configuration profile to an iPad via MDM, the manually configured network settings on the device (specifically, "Configure IPv4" and "Configure DNS") are reset to "Automatic". This erases the manually entered IP address, subnet mask, router, and DNS server addresses. Goal: We want to apply a Wi-Fi configuration profile from our MDM server to connect the device to a specific SSID, while preserving the manual IP and DNS settings that have been configured on the device. Question: Is there a way to prevent the IPv4 and DNS settings from being switched from "Manual" to "Automatic" when applying the configuration profile? For example, is there a specific key-value pair we can add to the profile to either preserve the existing manual settings, or to explicitly define manual/static IP settings within the profile itself for iOS/iPadOS? Reference: Sample Configuration Profile Below is a simplified version of the Wi-Fi configuration profile we are currently using. This profile does not contain any keys for IP address configuration. <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>PayloadContent</key> <array> <dict> <key>PayloadType</key> <string>com.apple.wifi.managed</string> <key>PayloadIdentifier</key> <string>com.apple.wifi.managed.13E2E6B3-D4B9-4E23-888A-524B3ED40C38</string> <key>PayloadUUID</key> <string>13E2E6B3-D4B9-4E23-888A-524B3ED40C38</string> <key>PayloadVersion</key> <integer>1</integer> <key>SSID_STR</key> <string>SSID</string> <key>EncryptionType</key> <string>WPA</string> <key>Password</key> <string>Password</string> </dict> </array> <key>PayloadType</key> <string>Configuration</string> </dict> </plist>

It seems like every time an IOS update is installed, the camera app file formats get reset to defaults. This setting is not available to manage at the MDM level. Many people need the the most compatible settings for the purpose of file sharing. So, now we have nearly 1,000 devices with a complete mix of photo and video formats. And IT has wasted MANY hours converting files for people. Feature Request: Please either stop resetting the camera app file formats or allow us to manage those settings at the MDM level. Respectfully, Robert

We are developing an MDM (Mobile Device Management) solution for device management purposes, and our current implementation process is as follows: 1. Configure DEP profile to obtain profile_uuid We configured a DEP profile with the following parameters to retrieve the profile_uuid: { "allow_pairing": true, "anchor_certs": [], "auto_advance_setup": true, "await_device_configured": false, "configuration_web_url": "", "department": "test define profile", "devices": ["MNWF07QD9M"], "is_mandatory": false, "is_mdm_removable": false, "is_multi_user": false, "is_supervised": true, "language": "zh", "org_magic": "", "profile_name": "Enrollment Profile - MNWF07QD9M", "region": "cn", "skip_setup_items": [ "Accessibility", "ActionButton", "Android", "Appearance", "AppleID", "AppStore", "Biometric", "CameraButton", "DeviceToDeviceMigration", "Diagnostics", "EnableLockdownMode", "FileVault", "iCloudDiagnostics", "iCloudStorage", "iMessageAndFaceTime", "Intelligence", "Keyboard", "MessagingActivationUsingPhoneNumber", "Passcode", "Payment", "Privacy", "Restore", "RestoreCompleted", "Safety", "ScreenTime", "SIMSetup", "Siri", "SoftwareUpdate", "SpokenLanguage", "UpdateCompleted", "WatchMigration", "WebContentFiltering" ], "supervising_host_certs": [], "support_email_address": "", "support_phone_number": "", "url": "https://mdmp.com/mdm/apple/enroll?shopId=1" } We sent a POST request to the /profile endpoint with the above payload, and the response returned the profile_uuid: 605FB5C274303C19189C9B99DCD3280D. 2. Assign the profile We sent a POST request to the /profile/devices endpoint, including the aforementioned profile_uuid and the target devices list in the request body. 3. Scan the device with Apple Configurator 2 We used Apple Configurator 2 to scan and enroll the target device. Issue Encountered After the device restarts twice, it fails to retrieve the mobileconfig file from the URL: https://mdmp.com/mdm/apple/enroll. We are using Nginx as the web server and have enabled access logging, but the logs show no incoming requests from the device to the /mdm/apple/enroll endpoint at all. Could you please help identify where we might have made a mistake in this process?

Hello Apple Developer Community, I'm experiencing an invalid_client error (HTTP 400) when attempting to authenticate with the Apple School Manager API using OAuth2 with JWT bearer assertion (RFC 7523). Despite verifying all configuration values and following Apple's documentation, I continue to receive this error. Error Details Error: invalid_client HTTP Status: 400 Bad Request Endpoint: https://appleid.apple.com/auth/oauth2/v2/token Response: {"error": "invalid_client"} My Configuration All values have been verified to match Apple School Manager exactly: Organization ID: 55155430 Key ID: 8136a1f6-c995-4010-b964-bc8278c107ef Client ID (Service ID): SCHOOLAPI.7c0c10a0-4d8a-4ef8-a2be-eda040b65c59 Private Key: Loads correctly, signs JWT properly (ES256) JWT Configuration I'm generating a JWT with the following structure: Header: { "alg": "ES256", "kid": "8136a1f6-c995-4010-b964-bc8278c107ef", "typ": "JWT" } Payload: { "iss": "55155430", "sub": "SCHOOLAPI.7c0c10a0-4d8a-4ef8-a2be-eda040b65c59", "aud": "https://appleid.apple.com", "iat": [timestamp], "exp": [timestamp + 30 days] } Token Request Method: POST Content-Type: application/x-www-form-urlencoded Parameters: grant_type: client_credentials client_assertion_type: urn:ietf:params:oauth:client-assertion-type:jwt-bearer client_assertion: [JWT token] scope: https://api.apple.com/auth/schoolmanager What I've Verified ✅ All configuration values match Apple School Manager exactly ✅ Private key file exists and loads correctly ✅ JWT is generated with correct structure (ES256, proper claims) ✅ Key ID in JWT header matches the Key ID from Apple School Manager ✅ Request format matches OAuth2 RFC 7523 specification ✅ Content-Type header is application/x-www-form-urlencoded ✅ Tried both Client ID and Organization ID as sub claim (both fail with same error) ✅ DNS resolution and API connectivity are working ✅ API account appears active in Apple School Manager interface What I've Tried Using Client ID as sub: Tried using SCHOOLAPI.7c0c10a0-4d8a-4ef8-a2be-eda040b65c59 as the sub claim Using Organization ID as sub: Tried using 55155430 as the sub claim (fallback) With and without scope: Tried both including and excluding the scope parameter Different JWT expiration: Tried various expiration times (30 days, 180 days) Verified Service ID format: Confirmed the Client ID follows the SCHOOLAPI.xxxxx-xxxxx-xxxxx format Both attempts (Client ID and Organization ID as sub) return the same invalid_client error. Previous Support Interaction I've contacted Apple Developer Support (Case #102783504559). They confirmed: The technical implementation is correct The issue is an account access/permission problem My Apple Account email is not associated with any memberships The Account Holder must add me to the Enterprise team membership However, I'm posting here to see if anyone in the community has: Experienced similar issues and found a solution Additional technical insights about the invalid_client error Suggestions for what else to verify or try Questions Is there a specific format requirement for the sub claim? Should it be the Client ID (Service ID) or Organization ID? I've tried both. Are there any additional claims required in the JWT beyond iss, sub, aud, iat, exp? Could there be a backend issue with the API account even though it appears active in Apple School Manager? Has anyone successfully resolved an invalid_client error that wasn't related to account access? Is there a delay after creating an API account before it becomes fully active for authentication? Technical Details Language: Python (Flask) JWT Library: PyJWT with cryptography library Algorithm: ES256 (ECDSA P-256) OAuth2 Flow: Client Credentials Grant with JWT Bearer Assertion (RFC 7523) Error Log I've generated a detailed error log showing the exact request/response. The key points: HTTP 400 Bad Request Response: {"error":"invalid_client"} Same error occurs with both Client ID and Organization ID as sub Any Help Appreciated If anyone has encountered this issue or has insights into what might be causing it, I'd greatly appreciate your help. I'm happy to provide additional details or try any suggestions. Thank you! Case Number: 102783504559 API Account: Created in Apple School Manager Status: API account appears active, but authentication fails