Outlook error message "The connection to the Microsoft Exchange Server is unavailable" After migration from SBS2003 -> SBS2008

After I migrated my SBS2003 Server to SBS2008, I am unable to start Outlook 2003 for one specific user on a win2008r2 Terminal server. Outlook does not connect to the new exchange server.
Obviously the user didn't start outlook after I moved Exchange to the new SBS server and before I demoted the old SBS.

I get the error message "The connection to the Microsoft Exchange Server is unavailable" after ~20secs.

Button 'Retry' repeats the same message;
Button 'Work Offline' pops up another error message saying "Outlook can't be started" (or similar - I am trying to translate the german message) and Outlook is closed;
Button 'Cancel' closes Outlook as well;

There are no messages in the eventlog;

Other users are able to start outlook on the same computer.
I already checked a couple of hints, such as the RPC-Registry settings and they seem to be fine.

How can I reset the mail-account information for this specific user, so that he is able to reconnect to exchange?
I already tried to change and or remove various registry keys and values in HKCU/software/microsoft/exchange and HKCU/software/microsoft/office/11.0/Outlook but did not succeed.
mhaberstockAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Glen KnightCommented:
Have you tried simply creating a new outlook profile?
Click in start goto control panel and Mail you can delete the outlook profile and create a new one.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
mhaberstockAuthor Commented:
Well, after all this was really easy  - Thank you!

After a painfull SBS migration, I expected a way more laborious solution.

At first I could not find the 'mail'-settings in Windows 2008 Sysconfig. But after I found them, it just took me a few seconds to change the server name in the existing profile.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Outlook

From novice to tech pro — start learning today.