We have Exchange 2010 (SP3 RU2) installed at two of our sites (single forest / domain). There are mailbox servers at both sites (let's call them site A and site B).
For users who's mailbox are at site B, Outlook Anywhere works fine. But not for users who's mailboxes are at site A. All other services appear fine (OWA, ECP, AS etc).
When I run MS Remote Connectivity Analyser for a site A user, it fails and reports RPC Proxy can't be pinged. If I run Test-OutlookConnectivity -protocol:http against the site A users mailbox (and use Get-Credentials), it fails on the last test...
RunspaceId : e0c7e2a2-feb6-427a-a6fc-7fbb670601b2
ServiceEndpoint : UKSP-EXCAS01.AD.Local
Id : MailboxLogon
ClientAccessServer : UKSP-EXCAHT02.ad.local
Scenario : Mailbox::Logon.
PerformanceCounterName : Mailbox: Logon latency
Result : Failure
UserName : <user>
StartTime : 19/12/2013 15:32:30
Latency : -00:00:00.0010000
EventType : Error
LatencyInMillisecondsString : -1.00
IsValid : True
Does anyone know what this actually means (logon latency -1), and what to try next?
The same test for a site B user works fine.
Thanks in advance!