You would like to grant a permission to a mailbox in Archive Manager to a user who has an Active Directory account but does not own a mailbox.
The Archive Manager Active Directory Connector does not discover logins that are not mailbox enabled by default.
By default the Archive Manager Active Directory Connector Service will not detect non-mailbox enabled accounts. You can set the Active Directory Connector to detect these accounts by adding this to Archive Manager's Configuration:
1. Start > Programs > Archive Manager >Archive Manager Configuration Editor
2. Click General Items > Add Item
3. Type: Directory Connector Import Users Without MailBoxes
4. Set the Value to True
5. Restart Archive Manager Active Directory Connector Service.
Once this is done and the non-mailbox enabled accounts are visible in the Archive Manager Web Interface you will then be able to grant desired permission to any user who does not have a mailbox.