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Outlook 2010 client does not connect to 2003 Exchnage server

I have a few new Outlook 2010 clients .. They have an issue where at random times they start Outlook and it starts to connect, goes almost immediately to "DISCONNECTED".

From the machine I can ping server by host or IP ... can login to OWA  and all other resources .. seems limited to Outlook client  
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1 Solution
Outlook connection issues with Exchange 2010 mailboxes because of the RPC encryption requirement
kjw5300Author Commented:

 .. the client is 2010, the server is 2003 ...
my bad...

got a chance to check the below URL?
Turned out to be a password authentication-related issue, resolved it by the following:
Account Settings>Change>More Settings>Security>Change "Negotiate Authentication" to "Password Authentication(NTLM)".

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