Why am I getting an "Operation Failed" message when attempting to send emails through MS Outlook 2007?

Hi:

I'm running Microsoft Outlook 2007 on my Windows 7 64 bit machine.
I've recently started receiving an "Operation Failed" dialog when attempting to send emails.

Particulars:
- I've got 2 profiles on my Outlook instance. 1 is Pop based and the other is Microsoft Exchange based (company.com).

- Emails sent to external addresses work fine. Emails sent to the Pop based instance work fine as well.

- Emails sent to addresses based on the Exchange instance fail. (johndoe@company.com)

- Sending to all emails worked fine until some point on Friday.

- At that point I noticed on doing a manual Send/Receive that send/receive on the Exchange server was taking a ridiculous amount of time; so I canceled the operation several times.

- If I log into the web instance of Outlook, I can send emails fine to all accounts.

The error message "Operation Failed" is pretty vague. I tried turning on logging to see if I get more information. Unfortunately, nothing jumped out in the log files.

How do I track this down?

Is this an address book issue?

Is there a way I can get more error information regarding the failure?

I've googled, but I haven't seen anything so far which really helps.

Just to reiterate; this was working all long until it started failing a couple of days ago.

Thoughts/direction?

Thanks,
JohnB
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jxbmaSoftware ConsultantAsked:
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jxbmaConnect With a Mentor Software ConsultantAuthor Commented:
The problem was that somehow the cached emails for my Company.com email addresses were somehow hosed.

I had to clear the cached version of the address. I did this by creating a new email and in the "To" field, typing the full email address and hitting <Ctrl> K to clear the cached value. I had to do this for each separate email address.


JB
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jxbmaSoftware ConsultantAuthor Commented:
Found the solution myself.
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