When accessing the Exchange Public Folders via the Exchange System Manager
you are actually going thru IIS to display that data. A vast majority of
these issues where you cannot expand the public folder tree via the ESM boil
down to a configuration issue with the Exadm virtual directory or the
The following KB article should help you to locate what is causing this
issue. Please walk thru it step by step even if you think a step does not
apply to your server. Most of the time this article will address this your
problem if it is taken step by step.
289492 XADM: Troubleshoot 80004005 Public Folder Error in Exchange System
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