your posting is in the wrong section of the forum, there is a special section for ADNM

Did you manually give in the exception on a client?
there is a way to insert exceptions via ADNM yes, dont know it by memory and since its sunday morning i have no connection to my ADNM console either. Browse through all the options from the groups the computers are in.
you should also send in the file that is "caught" to be a virus to Avast. They can analyse it to be a false positive and adjust their
signatures for it.