I am locked out of my calendar on iCloud. Does anyone know why?

I am having the exact same problem. It began when I downloaded IOS 9. Prior to that, my calendar entries were flawlessly synced between iPhone, iPad, Macbook Pro, and Outlook (on Windows PC). After the new IOS, nothing will sync and I get this error message. It has now been three days. A senior advisor is helping me but he cannot get the engineers to respond to his "ticket" at least not yet. Like you, I use this calendar feature for my work (I am a clinical psychologist) with lots of appointments to keep track of. I am concerned and more than a little steamed. Have you had any resolution as yet? If so, do you know anything about what they did to fix it?

I have the same problem. I tried to restore calendar from iCloud, as I had duplicated all my appointments by synching w/iTunes. The restore stopped after several minutes, stating there was an error. It's been locked ever since.

My calendar and contacts are still a total disaster. This started over a month ago and no fix seems to have been found by the engineers who are supposed to be working on this since 9/11/15. I was told to try another restore and I ran it for almost 2 full days. The only "good" thing is that my calendar is now unlocked but the calendar is not synching with my deviices...although tonight one of my phones is sucking with the iCloud calendar. I can't email off Outlook since all my contacts are a mess. I have to locate the email address and enter it in e field instead of hitting the "to" button if the contact were entered. Please contact me directly if you get any answers. Carole at CaroleNocickRealty.com.

correct spelling is Novick.

If any of you have been auto-updated to Office 2016, there in lies your problem. So far ICloud for PC is not compatible with Office 2016. Go to MS and revert back to 2013 version until one company or the other fixes it. MS just recently put the revert back option up because of this problem.

I am having the same problem and I have NOT been using Office 2016. I have an Office 2011 installed but I never use Outlook.

Dear Carol,

I am speaking to a senior advisor because the I Cloud calendar app on Icloud.com for my PC is also locked for a couple of weeks now. He doesn't work with PC's, but rather with IOS on the phones. However, he does say that he thinks this might be addressed in the next update. Please keep me informed about anything you do find out about why this is happening. I will start following your thread.

Thank you, Joan

Same problem. Today I spent more than an hour on the phone with an Apple engineer, they had no idea of why this is happening. I have a ticket open and a follow scheduled for the next few days. In the meanwhile I have imported by .ics backyp into Google Mail and using that one instead.

Incredible.