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Outlook cannot log on.  Verify you are connected to the network

visualutions asked
Last Modified: 2012-06-22
I have a single Exchange 2010 server installed.  All users connect to email by using Win2K3 standard terminal servers to access outlook.  By random selected, some users have not been able to access their email.  They can log into any of the terminal servers and have the same issue.  Also there are working users on the same termin al servers.

When trying to setup user I get the following error:

Outlook cannot log on. Verify you are connected to the network and are using proper server and mailbox name.  The connection to Microsoft Exchange is unavailable.  Outlook must be online or connected to complete this action.

I have tried everything I can think of to fix this issue.

Brief history:

We orginally had an Exchange 2000 server.
We upgrade it to 2003 and removed the 2000 server
We then deployed 2010, migrated mailboxes and removed the 2003 server.

This problem was happening ever since we moved to 2003.  We thought that moving everything to 2010 would resolve the issue.  Which it did not.


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