you can remove the extend.dat from the users profile if the user is not in outlook to clear the outlook addons (rebuilds when they open it)
you can manually remove both outlook scan addons and then add 1 back from the menu system in outlook, takes about 20 seconds
you can use installation designer to remove the outlook addon from VSE before you place the package on the epo server (assuming you dont want it)
you can set some switches that remove the outlook addon from the package as its installed on your deployment task (assuming you dont want it)
Ive just sent out 6000 of these deployments and I think I only got about 15 instances of this, I have read somewhere it only happens if you have 2 sessions of outlook open during the install.
Have a look at this thread for some ideas on removal http://community.mcafee.com/message/137635#137635