Set User Name Conflict Message
Specify the message displayed if a user name conflict is detected during login. This message is displayed if there is a local user with the same user name but a different UID than the Active Directory user logging on.
When the message is displayed, the %s token in the message string is replaced with the name of the conflicting local account. The message string you define must contain exactly one %s token, and no other string replacement (%) characters.
For example:
Account with conflicting name (%s) exists locally
This group policy modifies the pam.account.conflict.name.mesg setting in the agent configuration file.
For information about what to do when local conflicts are detected, see Set UID Conflict Resolution.