No error is reported for the user accounts within the sync reports for either Office 365 or CloudLink.
When attempting to add the alias manually to the account from Manage the following is returned -
The domain does not exist
A new archive cannot be created or updated for a domain which isn't a part of a company's Arctera Archiving instance either using CloudLink or Office 365 Sync to remotely manage users. The account also cannot be manually updated using the Arctera Management Console as the domain does not exist.
Contact Support to add all the domains of the company on which archives need to be created/updated.
Office 365 Sync & CloudLink cannot Create or Update alias/username on archive if the domain of the user isn't a part of the company's Arctera Archiving instance.