Hi all and thanks for reading.
This is a completely new installation, all Servers and Clients have been installed fresh on new Hardware.
Information:
Small Network, 2 Servers:
1x DC - W2k12R2
1x Exchange 2013 - W2k12R2
Clients: W10 + Office 2013
All patched up to the newest Windows / Office / Exchange Updates (Cu 15)
Network is currently without Internet.
Exchange has a selfsigned cert, generated with installed AD-CA on the DC. Cert contains names for external and internal URLs configured within exchange and has been imported to all Server and Clients.
The external and internal URLs have been set in the exchange.
Error:
When you try to configure Outlook, the assistant completes the autodiscover, the last steps keeps saying: "the connection to microsoft exchange is unavailable. outlook must be online or connected to complete..."
Trying manual config also generates the same issue
OWA, Ping, Test-Outlookconnectivity without any errors. (Also no certificate warning in OWA or outlook)
No errors in the eventlog of the servers or clients.
additional info:
At some point of troubleshooting, i have also activated MAPI over HTTP, but this hasn't changed anything about the error, also the mapiselftest probes don't show any error.
get-healthreport shows "unhealthy" at "network", but i was not able to determine the exact problem, yet.
i would appreciate any help or hints to further track down this issue.
Thanks in advance
/EDIT:
Oh, and currently there is no antivirus or firewallsoftware installed