I have a strange problem.
I have a Sonicwall NSA, behind this appliance I have a (VM) Exchange 2013 server in the normal LAN (and a DC).
I have also a VM that’s running in VLAN 12, when I want to connect to the Exchange 2013
server (by mailaddress and password, Autodiscover) then I get a error that it can’t
find the address at the addresslist. (from the 3 tests, the first one will pass, the last one gives this error)
But when I start Outlook on a server in the same LAN then it works good.
When I connect external from another place, it connects also and works good.
The Sonicwall creates also automatic loopback NAT rules.
I can also reach the OAB and I can login. OWA works also.
I don’t understand why the Outlook connection doesn’t work.
(I test it with a few 2008 R2 VM’s in different VLANs)