Hi Siddharth,
Hope you had a great weekend. We already have a process in place (Sending comms to users, holding the batch runs e.g. CATA) during payroll run. It's not working out as expected as we still have some users (quite a few to be precise 
) who are playing with the system. Thanks for the suggestion and will def. look into (HFIUCPL0) for unlocking the users. Have a great day/week ahead and I'll keep you posted.
Regards
SB