Outlook Anywhere through Forefront UAG with NTLM authentication

[_Adam_]

Asking here before raising an MS ticket, but has anyone published Exchange 2013 through Forefront UAG 2010 SP3 (with Rollup 1) and limited it to NTLM authentication? For me, it works for everything except passing RPC through UAG which breaks OA.

 

I followed this guide without issue: Download Publishing Outlook Anywhere Using NTLM Authentication With Forefront TMG or Forefront UAG from Official Microsoft Download Center

 

The Remote Connectivity Analyser throws an error at: Attempting to ping RPC endpoint 6001 (Exchange Information Store); The RPC_S_SERVER_UNAVAILABLE error (0x6ba) was thrown by the RPC Runtime process.

 

Telnet to the 6001 port internally works fine. I am hopeful someone is running a similar config and I can compare key components.

[_Adam_]

After several days with the aid of a MS ticket it has been resolved and working well. Too many changes to list here for others unfortunately.