Actually looking at it more closely I think this error relates to the
Outlook Offline Address Book, which is also a public folder, rather than the
regular ones.
Check your Exchange servers event logs for error messages relating to the
OAB. You should also post this question in one of the Exchange newsgroups.

Signature
Aloha,
-Ben-
Ben M. Schorr, OneNote-MVP
Roland Schorr & Tower
http://www.rolandschorr.com
Microsoft OneNote FAQ: http://www.factplace.com/onenotefaq.htm
**I apologize but I am unable to respond to direct requests for assistance.
Please post questions and replies here in the newsgroup. Mahalo!
> Hi Ben,
>
[quoted text clipped - 7 lines]
>>Is pmci-10 the correct server for the public folder store? How many
>>Exchange servers do you have?