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Outlook temporary mailbox

I installed MS outlook 2010 last week on one of our user machines.  The mail is handled on our server which is running MS server 2008 with Exchange Server 2010 for the mail.

The install seemed to go ok, but I am getting a message on the upgraded user machine, as I start Outlook, that I should choose between using a "temporary mailbox" or use the "old data" in which case the user cannot send or receive.  How do I change back to use the old mailbox instead of the temporary mailbox?

I have been selecting to use the the temporary mailbox and it does all work (has the user's old mail and will send and receive mail) except that when the user sends mail it goes out but the message stalls in the outbox rather than going to the sent messages box.

I have confirmed that the email and data files on the user machines appear to point to the correct old account.
2 Solutions
I've seen this with older versions of Exchange/Outlook....  There is a mismatch between the exchange server, and the local CACHED copy...

The solution I used ---   make a PST backup of the local user's mailboxes and all the parts that go with it.   Then, changed them to NON-CACHED, restart outlook, and it will then no longer use the local cache...

If everything shows up properly here, then you probably won't need the backup you made, but never hurts to have it anyways.

You can now go into the users local application/microsoft/outlook folder, and remove the old OST/PST that might still be there.   I generally just rename them for the moment.

Change the person back to cached, and it will rebuild the local copy, and that should solve the complaint.

I suspect the same will apply to your version of Exchange...
This can often happen if outlook thinks theres an error or issue with the mailbox

Although you often see it when modifying the users Exchange Account linked to the profile

Then changing it back

When you see this you can often fix the issue by closing outlook
Reopen using start>Run>Outlook.exe /safe

May ask what profile to use, just select the users usual profile
Once open, close outlook

Now reopen again as normal, it should be okay
ken_bAuthor Commented:
I just tried the /safe fix, but it still reacted the same:  asked me if I wanted to use the temporary mailbox as I went into outlook.

I am off to try the pst backup and rename for non-caching proposed fix next.

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