Connect to LDAP account using smartcard (PKINIT) - can user matching ignore case sensitivity?

For smartcard login, my certificate contain UPN which is lowercase formatted (i.e. user123). However, in DC its capitalized (i.e. User123).
The login fails with the following log (taken from log show) :

Code Block 
SmartCard - User is not paired with any smartcard .

From the logs it seems that an attempt has been made to lookup this name by opendirectoryd but it has failed since the match policy is case sensitive (or as the logs says, CaseExact.)

Here's the relevant message :

Code Block 
2020-12-24 12:40:44.901571+0200 0x1f237    Info        0x14742              85     0 opendirectoryd: 
[com.apple.opendirectoryd:session] ODQueryCreateWithNode request, NodeID: E4648A1C-B2E1-4329-B702-5CADC51B9235, 
RecordType(s): dsRecTypeStandard:Users, Attribute:dsAttrTypeNative:dn, MatchType: EqualTo, 
Equality: CaseExact, Value(s): <private>, RequestedAttributes: 
dsAttrTypeStandard:AuthenticationHint,dsAttrTypeNative:_guest,dsAttrTypeStandard:AuthenticationAuthority,dsAttrTypeStandard:AppleMetaNodeLocation,dsAttrTypeStandard:Rec
ordType,dsAttrTypeStandard:GeneratedUID,dsAttrTypeStandard:PrimaryGroupID,dsAttrTypeStandard:RecordName,dsAttrTypeNative:original_authentication_authority,
dsAttrTypeStandard:HomeDirectory,dsAttrTypeStandard:UniqueID,dsAttrTypeStandard:RealName,dsAttrTypeStandard:AppleMetaRecordName,
dsAttrTypeNative:home_info,dsAttrTypeStandard:NFSHomeDirectory, Max Results: 1

Does the lookup make deliberately in case sensitive. I presume that it simply take the name from the certificate inside the smartCard, but is there an option to match with lowercase ?

thanks