We still appear to have an issue that when user's mailboxes are first enabled for archiving they get prompted for credentials.
In the vault information log on the client, we get the following however you can browse to this location via IE without issue:
HTTP connection failed http://evmail.[FQDN]/EnterpriseVault (Status: 0x56)
I've added the server name (short and FQDN) into the Desktop policy 'Add server to Intranet Zone' option which hasn't resolved it. I've also added the servers as Trusted Sites via a GPO which I've confirmed via the registry.
I've followed through article 295039 without success, other than once the user has entered thier credentials once (and checked the save box) then they don't get prompted again.
Anyone else had or resolved this issue?