LLU00910 SUPPORT FOR IDENITY TOKENS (IDT) AND IBM MFA COMPOUND UPDATE went as a PRE for LU01329 ALLOW LDS TO HONOR SYSOUT() CONTROL OPTION UNDER SUB=MSTR.
After applying this maintenance users cannot logon
TSS7070E IDT Processing error: Specified user not valid for IDT.
Release : 16.0
Component : CA Top Secret for z/OS
Any userID that begins with "$" (eg. $1234) are being interpreted as invalid for IDT processing.