NIS 21.1.1.7 and Outlook 2007 on Win7 Pro: disable email scanning on .PSTs?

Folks:

 

I just upgraded NIS to 21.1.1.7. I'm running Outlook 2007 on Win 7 Pro 64 bit fully patched.

 

In my earlier version of NIS (?2012?) I had disabled email scanning due to potential corruption issues on my .PSTs.

 

Is it necessary to continue to do this with NIS 21.1.1.7?

 

Should I also disable NIS' anti-spam features?

 

Pete