The message in the DRAS task for V12.1 is ACF01044 PASSWORD PHRASE NOT SET FOR LOGONID UserID
The same "UserID" logs into the same DRAS task successfully from 11.5 Web Viewer.
The user had changed their password to one with 9 characters and ACF2 was reading it coming to DRAS as an attempt to send a Passphrase, which led to the DRAS Log showing: ACF01044 PASSWORD PHRASE NOT SET FOR LOGONID USR2ID2
When the user changed to an 8 character password, they were able to log into Web Viewer and work normally. In order to stop this scenario from recurring:
Explanation: If it is never set, the database will contain a NULL value, which allows Web Viewer to send the more than 8 characters when the user attempts to login. By checking the checkbox, updating it, and then unchecking it and updating it again, the database will no longer contain a NULL value for the parameter, and subsequently Web Viewer will truncate any password value greater than 8 characters.