I have installed outlook alongside the McAfee toolbar and I have several email accounts to setup. With the help of outlook rules being set to direct inbound messages to a particular folder , Now at the time of McAfee toolbar scanning,  I received as spam and also got the error message as follows… “Theaction cannot be performed in the current Outlook folder“If anyone know the solution please provide me as it will be a great help for me. Thank You.
Outlook 2003 Error Message is displayed
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This is a some sort of limitation from the McAfee Anti-Spam that you have installed. This is a problem that McAfee is still trying to resolve. What you can do is every time that you receive an e-mail, after reading or checking on it, click on Run Rules Now and after that you direct that e-mail to a certain folder that you like. That is just a work around which means you’ll have to do the same routine every time.
Another option is do not use the McAfee Anti-Spam instead use your Outlook to manage spam e-mails. Or you can just try a different antivirus.