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go through.<br />
<a href="http://www.howexchangeworks.com/2009/09/cant-connect-outlook-2003-to-exchange.html" rel="ugc">http://www.howexchangeworks.com/2009/09/cant-connect-outlook-2003-to-exchange.html</a>
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go through.
http://www.howexchangeworks.com/2009/09/cant-connect-outlook-2003-to-exchange.html [http://www.howexchangeworks.com/2009/09/cant-connect-outlook-2003-to-exchange.html]

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Refer to this MS article <a href="http://support.microsoft.com/kb/2006508" rel="ugc">http://support.microsoft.com/kb/2006508</a>&nbsp;and it should help you fix the issue.<br />
<br />
let us know how it goes.
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Refer to this MS article http://support.microsoft.com/kb/2006508 [http://support.microsoft.com/kb/2006508] and it should help you fix the issue.

let us know how it goes.

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Actually it had nothing to do with office sp3. &nbsp;It was an acl problem on the core switch.
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Actually it had nothing to do with office sp3.  It was an acl problem on the core switch.

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After a mailbox move from exchange 2003 I can't open a 2010 mailbox from Outlook 2003 even though EncryptionRequired is set to false on the 2010 exchange server
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After a mailbox move from exchange 2003 I can't open a 2010 mailbox from Outlook 2003 even though EncryptionRequired is set to false on the 2010 exchange server

can't open a 2010 mailbox from Outlook 2003

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.