I have an on-premises user with a hosted archive. The archive status is active, the script set the on-premises archive status to 1, but the archive mailbox still won't connect. In OWA, the archive mailbox shows in the folder list but when I attempt to expand the Online Archive, I get a error dialog box stating that the 'archive appears to be unavailable'. Outlook 2010 cannot connect to the online archive either. On the Exchange Server, in the event viewer, I see a warning, Event ID 115, 'Unable to open mailbox session fro archive mailbox', '...An unsecured or incorrectly secured fault was received from the other party...'
Any thoughts?