The Archive Manager web application cannot connect to the ArchiveManager database.
Users are trying to access the Archive Manager Website from a Child Domain and Archive Manager is installed in the parent with Windows Authentication enabled. As the credentials pass through the child domain to the parent, to the Web Server (IIS) running the Archive Manager website and through SQL they may be getting dropped.
Enable Forms Based Authentication on the Archive Manager website so that the credentials authenticate correctly.
The users will be brought to a forms based login screen where they can type in their Active Directory credentials and login to the Website.
WORKAROUND 2 (If SQL Errors)