Try exporting all the rules with the rules wizard,
one to a file, restart Outlook with the /cleanrules command line switch, and
reimport each rule one at a time to see which one may cause the error. If
none does, you should be back in business. If one does, you'll know for
sure why and which one.
I periodically get a window displayed on my screen related to Rules in Error.
The rule is "Server-Requested Client Action".
The error states, "Unable to find destination folder. The folder may be
deleted or in a PST Outlook could not open.".
Does anyone know what this is telling me, and is there a correction/fix for
this?