can't open a 2010 mailbox from Outlook 2003

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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tfgeorgeAsked:
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tfgeorgeAuthor Commented:
Applied Office SP 3 and now it works.
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Satya PathakLead Technical ConsultantCommented:
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lastlostlastCommented:
Refer to this MS article http://support.microsoft.com/kb/2006508 and it should help you fix the issue.

let us know how it goes.
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tfgeorgeAuthor Commented:
Actually it had nothing to do with office sp3.  It was an acl problem on the core switch.
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