Question : OALGen Error every morning

This has been happening for about a year, and I can't get it figured out.  We are running a single Exchange 2000 server in our environment, and it crashed about a year ago and was not brought back up properly, I think we reinstalled Windows from scratch and Exchange (but in a panic, and before we knew what we were SUPPOSED to do), but didn't use the DR switch or anything....Anyway, everything works fine, except for this, and I think maybe it's looking for some old files or something.  Here's the error I get:

OALGen encountered error [0x80004005] while calculating this OAL.  This OAL will not be available for client download.  (\Global Address List)

Now, when I go into Exchange System Manager>Recipients>Offline Address Lists, there is only one listed, and it's called "Offline address list".  The Offline Address List Server" is my Mail Server, and under "Address Lists:"  the only thing listed is "Default Global Address List", and it's set to run every morning at 4:00am, which is when I get the error.  Any help in getting this resolved would be much appreciated.  Thanks.

Answer : OALGen Error every morning

This article as MS is very close.
http://support.microsoft.com/?kbid=828101

The error code I think is permissions. I would also suggest rerunning forest prep and domain prep for Exchange.

Simon.
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