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Outlook 2007 Looses Connection to Exchange Server

Users computer has lost connection to the exchange server.
Originally Outlook was saying that it was disconnected or offline
I removed the profile and re-added it and now it says
"The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action"

Environment:
Office 2007 (Latest SP)
Windows XP pro SP3

It was working fine up until a couple a days ago
- The user exists in another country,
- I have added the users account on another workstation in a remote location and it has worked with out any issues
- No one else has had any issues in the environment
-We believe it is an isolated issue to do with the notebook
- Have tested the exchange connectivity on the notebook through https://www.testexchangeconnectivity.com/ and everything was OK
-  We have removed 2007 and reinstalled
- We upgraded to 2010 with no luck and the downgraded back
- Reinstalled SP3 and other Microsoft updates
- we have tried it on the domain account and on local account of notebook and still no luck

If anyone has any ideas, you help is much appreciated

Thank you in advance!
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Paul-Anthony
Asked:
Paul-Anthony
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1 Solution
 
MHMAdminsCommented:
How long has that notebook be away from the domain? You might want to try and re-join the computer back to the domain and see if that might help. Also is the other person using a VPN to connect into the domain for exchange server access?
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Paul-AnthonyAuthor Commented:
Thanks for your post Ok so I have disconnected the notebook from the domain and changed the computer name
Still no luck
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R--RCommented:
Remove outlook from cache mode and check.
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Paul-AnthonyAuthor Commented:
Thanks R-R
I have tried it without Cache the difference in message that is received is

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

I feel that Outlook seeing the network LAN connection, I have uninstalled and re installed the network adapter (wireless), double checked the network settings on outlook....
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Paul-AnthonyAuthor Commented:
I have given up and re-imaged the system...
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Paul-AnthonyAuthor Commented:
What I ended up doing
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