Entourage LDAP error 150 after migration from Exchange 2003 to SBS2008

I recently migrated an Exchange 2003 server to SBS2008. Now my Mac Entourage email clients are getting an LDAP error 150 throughout the day. I've seen this issue posted on the net, but haven't found a single solution. Can anyone shed some light on how I might resolve this issue?
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Glen KnightCommented:
If it's a recent migration is it fully upto date?  Have you installed ALL available Microsoft updates on the SBS Server?  When you go into Windows Update make sure you click the link to check online for updates.  Continue to do this until there are no more available.

Also make sure that the Mac is completely upto date.

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Ady FootSharePoint ConsultantCommented:
This question has been classified as abandoned and is being closed as part of the Cleanup Program.  See my comment at the end of the question for more details.
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