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Outlook 2010 64 bit Exchange 2003

Posted on 2014-03-28
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Last Modified: 2016-11-23
I recently purchased two Dell Latitude laptops, Win 7 Pro.  The first one is running Office 2010 32 bit, and email is working fine.  The second one is running Office 2010 64 bit, and I'm having problems with Outlook.  Whenever I log on, it gives me the "no default mail client" message, and tells me to run Outlook and set it as the default.  I have done this, I have also tried setting it as the default through control panel, I have tried repairing and reinstalling Office, and I have also tried deleted the Outlook 2010 registry key.  The message still comes back.

Even more importantly, I can't send email.  I can receive it fine, but if I try to send an email, it just stays in the outbox, even if I hit Send/Receive.

Our mail server is running SBS 2003, Exchange 2003 SP2.  I'm wondering if there are compatibility issues between Outlook 2010 64bit and Exchange 2003,  or what else the problem could be...

TIA
Christina
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Question by:tinajoe7
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Tony Giangreco earned 2000 total points
ID: 39962399
Make this change in Outlook:

Account Settings>Change>More Settings>Security>Change "Negotiate Authentication" to "Password Authentication(NTLM)".

http://social.technet.microsoft.com/Forums/office/en-US/ee139ec8-eba5-4bcb-bf0c-0d6bbe907914/outlook-2010-wont-connect-to-exchange-server-2003
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Author Closing Comment

by:tinajoe7
ID: 39962478
Yay, that worked!  Thanks!
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by:Tony Giangreco
ID: 39962498
Glad I could help
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