Having connection issues with Ex2013 + Outlook 2007/10 clients. Basic problem is that outlook client and exchange server aren't talking properly. Emails will get stuck in the outbox, outlook will be updating, outlook will drop connection and then restore itself. connection to outlook has been restored, etc. This is happening to all internal users and all seem to get a combination or one of the issues.
This is not related to outlook profiles, corrupted ost's, different versions of outlook, etc. as mentioned all users have the issue. ~50. External users connecting via outlook anywhere are fine, no connection problems.
We have changed ADSL+WAN links recently (corporate network) and i believe the changes have pretty much started since then so this could be a network related issue. Problem is every networking test checks out OK. I have also tested and checked the connection status within outlook. Even if stuck on updating it is OK. Have also checked the MSexchange connectivity website and all OK, certificate is valid, naming is correct, etc.
Almost seems like it is dropping in and out of local and outlook anywhere access to talk to the server. Although i am aware exchane2013 relies on outlook anywhere. Have checked the Exchange server, no errors, all certificates, VD's and outlook anywhere config are correct. Telnetting to all required ports internally, externally are OK. All services running. No issues with activesync, OWA. Internal and external ping of server is fine.
Current work around is when outlook starts to play up, users close off for a few seconds and then reopen. It works again for a little while before either drops connection and reconnects, emails get stuck in outbox or it sits on updating.
Packet sniffing, tracerts to all network equipment, switches, etc have come back OK also.
Looking fwd to seeing if anyone has any suggestions.