hello! we have an ongoing problem, where our exchange server keeps dropping connections- and services become unavailable
the event that we get at the time this happens is the following
MSExchange System Attendant - Event ID 4001
A transient failure has occurred. The problem may resolve itself in awhile. The service will retry in 56 seconds. Diagnostic information:
Cannot open mailbox
we then receive the following event
MSExchangeMailSubmission - Event ID 1009
The Microsoft Exchange Mail Submission Service is currently unable to contact any Hub Transport servers in the local Active Directory site. The servers may be too busy to accept new connections at this time.
we then get
MSExchange ActiveSync - 1022
The connection between the Client Access server and Mailbox server "server.int" failed.
MSExchangeIS - 10025
There are 20 RPC requests that take abnormally long time to complete. It may be indicative of performance problems with your server.
any ideas? this has been happening every other couple of days and kills everyones exchange connection for a couple of minutes