I've followed all the normal troubleshooting methods, and it is definitely an issue with server configuration. I have ensured that SBS Cert is installed correctly, all my Outlook parameters are correct, the RPC Proxy is installed (as it is installed as a part of SBS) and I have confirmed and double checked the configuration. I have followed the guide to check all components and cannot find anything obsucre -
I have also run the Exchange Server Remote Connectivity Analyzer - <a href="https://www.testexchangeconnectivity.com/
I receive the following error message on the last step:
Testing NSPI Interface on Exchange Mailbox Server
An error occured while testing the NSPI Interface.
Attempting to ping RPC Endpoint 6004 (NSPI Proxy Interface) on server rohrig2k3dc.rohrig.local
Failed to ping Endpoint
RPC Status 2147483647 (2147483647) returned in 0 ms.
When connecting using RPC over HTTP on the local network I can see that the connection fails on the HTTPS protocol and reverts back to TCP/IP connections in Outlook.