Outlook Cannot Establish Connection To Exchange while using Citrix VPN

emailexchangeoutlookvpn

I have several user who travel and connect to our network using Citrix VPN. Once they are connected they can connect to our servers..etc. but when opening up Outlook they are greeted with a login window. No combination of usernames will allow Outlook to connect to the Exchange Server. If the user is in the office, the connect works just fine. Note: This is only a handful of users out of hundreds. I even tried a brand new machine but the issue still remains for these people. Any thoughts?

Best Answer

Question

  • What version of Exchange are you using ?
  • Are these domain joined workstations connecting over VPN ?

2 suggestions.

  • Try rpcping utility from the workstation to the server over VPN.

    RPCPing.exe -t ncacn_http -o RpcProxy=fqdn.yourdomain.com -P "testuser,yourdomain,testpassword" -I "testuser,yourdomain,testpassword" -H 1 -u 10 -a connect -F 3 -E -v -3 -R none -q

  • More details on RPCPing here - http://support.microsoft.com/kb/831051

  • For non domain joined workstations, you can specify additional credentials.
  • For Windows7 and Up, Go to Control Panel> User Accounts > Manage your credential, Add a Windows Credential. That should take care of the login window.
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