How long to validate an exception ?

Hello,

For some reason Sophos categorize one of our very serious domain as "provocative attire" Smiley so I put an exception to this domain as I already made for some other blocked sites we met. But this time it has been six hours and still nothing when for earlier occasions it had been much faster (and I feel the hot breath of the angry developers on my neck).

The docs do not give any information on this topic, could it be added and what duration is to be expected  ?

Thanks