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Unknown Error on Outlook (0x80040201)

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When Sending and Receiving I get an error message Sending' reported error (0x80040201): 'Unknown Error 0x80040201'
My system is Vista and using Microsoft Office 2007.  How do I repair this error?
I'd like to thank you in anticipation for your help

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Dashing star

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This can happen if you disconnect Outlook from Exchange server and reconfigure it to use a local .pst file instead of an Exchange server mailbox. After this some Global Address list entries may stay cashed in Outlook client and will cause this error.  Before sending the message Outlook will try to resolve all the recipients and since Global Address List is not available any more, it will report an error.
When you try to open properties for such address entry the following error will be reported:
The name or distribution list has been deleted and is no longer a valid Address Book entry. The item could not be found.



Remove the cashed entries from the Outlook client. For detailed instructions have a look at FAQ article 000032 How to remove addresses from the Outlook address cashe.

Edited by Dashing star, 26 June 2015 - 03:40 AM.

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