I am currently running both Exchange 2003 (1 server) and Exchange 2007 (1 server). My internal domain is domain01.com and external domain.com. Most of the users' mailboxes are still on the 03 box until the 07 has been tested and configured properly.
With a test user on the 07 box, I'm having trouble to get the Autodiscover working from outside. Inside, it works ok without an issue.
When trying to configure an Outlook 07 profile with Autodiscover from outside, I get the following error message.
"The action cannot be completed. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.
I do have an A record for autodiscover.domain.com on my external DNS to point to my mail server.
I also have a SRV record on my external DNS -
Port Number: 443
I have ran the https://www.testexchangeconnectivity.com/
tool and it fails 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 PRO4IAEX02.pro4ia01.com
Failed to ping Endpoint
Any ideas? Thanks in advance!