Initial that LegacyExchangeDN is not populated on certain contact objects. This was a mixed environment with Exchange 2007 and Exchange 2010. After running Update-Recipient, LegacyExchangeDN is populated on all contacts, but several are still not showing up in the address book. It appears update-recipient is working correctly on Exchange 2010, but not Exchange 2007.


After further examination, it looks like msExchALObjectVersion attribute was not populated for the non-working contacts. Recipient Update Services in legacy Exchange environments should populate this attribute.


Running /PrepareLegacyExchangePermissions, then running update-recipient populated msExchALObjectVersion and allowed the contacts to show up in the addressbook. More information about PrepareLegacyExchangePermissions can be found here:

Additional Information

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