My understanding is that even with OAS disabled for a directory, it will still "touch" a file, but won't actually scan it.
This is because it still needs to filter the file request (as McAfee scanning is so integrated into the OS), but when it knows that it is on the exemption list, won't physically scan it.
If you look at the Statistics page, it should not increment the number of files scanned.
Here's a simple way for you to test this out for yourself. Open up VSE, and add an exclusion for C:\ (and any other drives), and also tick the "include subdirs" option. Then the OAS will be enabled on the computer, but nothing should be scanned.
Perhaps someone from McAfee can comment further about expected behaviour etc.
Where is this Statistics page you mention?
Under the VirusScan Console right-click 'On-Access Scanner" and select 'Statistics'.
That's the ticket. Thanks. It worked perfectly and I know it's at least working now.
I had a look at my users server and noticed in his exclusion list he had multiple drives with similar entries. For instance drives F, G, and H. This is what the entries looked like for F but are the same for each drive. Note, each entry is configured with "Exclude subfolders".
My logic told me the first entry is all that is needed. After speaking with my user he mentioned the double slash and folder entry were automatically entered after he clicked on the drive via the browse option. Have you ran into this before and do all entries need to exist or just the F:\ will do?