When creating a user in ActiveRoles Server, the length of the User logon name (Pre-Windows 2000) SAM-Account-Name attribute is limited to 20 characters.
ActiveRoles Server is using the Active Directory built-in settings for the SAM-Account-Name attribute.
The SAM-Account-Name attribute (also known as the pre–Windows 2000 user logon name) is limited to 256 characters in the Active Directory schema.
However, for backward compatibility the limit is 20 characters.
For more information, see SAM-Account-Name Attribute.