Message: Exchange 2010 Exception. code:0x0000027a Error completing exchange 2010 command. ERROR: Error on "UserAccount":Failed to resolve the linked master account and verify it exists in a forest different from the one hosting Exchange. The error messasge is : Failed to reconnect to Active Directory server . Make sure the server is available, and that you have used the correct credentials.

I know this message seems straight forward but the connection doesn't fail and the AD DC is available, does anyone have any other ideas as to what may be causing this issue?