How remove primary account from outlook 2010

Hi,

I have 3 accounts setup in Oulook 2010 Beta, 2 Microsoft Exchange ones and 1 IMAP one. Now I want to remove 1 of the Microsoft Exchange accounts (because the company changed servers). And when I go to the Account settings, select the account and click remove I get the following notice:

[quote]
The primary account cannot be removed unless it is the only account in the profile. You must remove all other Exchange accounts before removing the primary account.
[/quote]

I can remove the other Exchange Account, but I don't want to as I want to continue to use it. How can I remove the primary account? (BTW: What is a primary account? Is it because this account was added first to the profile or something?)

Thanks a lot in advance