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Microsoft KB Archive/246279

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Knowledge Base

XFOR: PAB Addresses Invalid After Migration from Microsoft Mail for PC Networks

Article ID: 246279

Article Last Modified on 10/28/2006


  • Microsoft Exchange Server 5.0 Standard Edition

This article was previously published under Q246279


When you attempt to migrate Microsoft Mail for PC Networks mailboxes to Microsoft Exchange Server 5.0 mailboxes, the addresses in any Personal Address Book (PAB), including all distribution lists, are invalid. Using them results in non-delivery reports.


Microsoft Mail for PC Networks uses an older addressing format, 10/10/10 (Network/Postoffice/Mailbox), which is not valid for current Exchange Server addressing.


There is no workaround for this issue. You must recreate each PAB and distribution list.


There is no tool that updates your PAB entries as changes are made in the Microsoft Exchange Server global address list. Mail bearing a Microsoft Mail for PC Networks address goes to the Microsoft Mail Connector, which does not have a postoffice configured with that address and therefore returns the mail as undeliverable.

When you readdress this undeliverable mail by using the Microsoft Exchange Server global address list, it is delivered normally. To prevent mail's being undeliverable because of outdated addressing, replace all PAB entries created in Microsoft Mail for PC Networks with new ones created in the Exchange Server environment.

Additional query words: postoffice

Keywords: kbprb KB246279