Outlook RPC/HTTPS works great when remote, but when on LAN it doesnt connect. Outlook says "Trying to connect......."
When I try outlook /rpcdiag I can see that it tries to connect but fails and then after a while it connects using TCP/IP instead off HTTPS.
AND that is because when on LAN the PC's can't connect to https://mail.myexternaldomain.com
If I (on LAN) in internet explorer tries OWA using: https://mail.myexternaldomain.com/exchange
it fails. But https://myInternalExchangeServer/exchange
works fine and from outside the https://mail.myexternaldomain.com/exchange
So ther is a LAN problem with https://mail.myexternaldomain.com
Tried to run
NSLOOKUP mail.myexternaldomain.com and it answers this and it seems to be the correct answer.
SO WHY CAN'T I CONNECT when on LAN????
Maybe this is not an Exchange / Outlook /RPC/HTTPS question but a DNS question.