I am in the phase of migrating my Exchange 2010 Server to Exchange 2013.
Some mailboxes are currently to Exch 2010 and some have been migrated to Exch 2013.
Using Outlook 2007 and for Mailboxes that now live on Exch 2013:
- I add a new E-mail Service and select the Microsoft Exchange ‘’profile”
-I enter the Exch Server 2013 IP address
-I enter the user name and when I click check (in order to find the username)
I receive the following message:
“The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.”
Please note that following the above procedure for mailboxes that are still on Exch 2010,
the username is resolved successfully and the outlook connects to the mailbox.
Please also note that I can successfully connect to the Exch 2013 Mailboxes via OWA, IMAP and POP3.
What am I missing here?