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Fix for: Outlook 2003 can’t connect to Exchange 2010

By Jesse | May 19, 2010

If you try to connect an Outlook 2003 client to an exchange 2010 server and you find it doesnt work, try this first, this will fix it.

In Exchange 2010, they have enabled “Encrypt data between outlook and exchange”.  This was not enabled in prior versions of outlook.   If you go into properties of your exchange connection, it’s listed under the security tab at the top.   Just check the box, completely close outlook.. Reopen it and it should now connect.

If you want a walkthrough please see below:

  1. Goto control panel and open the mail icon.   From the mail icon, you will see the screen below. Select Email Accounts:

  2. Select View or change existing e-mail accounts, then next:

  3. Select your Microsoft Exchange Server connection then press “Change”:

  4. Select “More Settings…”

  5. Select the security tab and the enable “Encrypt data between Microsoft Office Outlook and Microsoft Exchange server.”

  6. Close and restart outlook and you should now be able to connect to Exchange 2010 from Microsoft Outlook 2003.
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