2 load balanced CAS/web exchange 2010.
"the connection to microsoft exchange is unavailable. outlook must be online or connected to complete this action"
No one is experiencing this externally, only internally on terminal servers.
Lync 2010 and Outlook 2010.
They get the Lync MAPI conneciton prompt.
Occasionally, after the above outlook error are prompted to enter credentials for exchange logon.
When I go to connection status during this issue, the "outlook.domain.com" URL is "established" for mail, but referral, and 2 directory statuses are "disconnected" or "connecting".
Address book service on 2 front ends are fine and started during this issue.
This is only happening for one department in our environment. Of course, they are the only department that uses Lync internally on terminal servers.
Lync config also says "EWS not deployed"
Other departments testing Lync internally so far, "EWS ok".
No other departments are having outlook issues.
Departments differ from one another by OU and GPO.
Josh