I need to restrict the use of messenger

:blush: I need to know if it is possible to restrict the use of messenger in a network administered with mikrotik

i blocked the tcp port 1863:
/ip firewall rule forward add protocol=tcp dst-port=1863 acton=drop

and messenger doesnโ€™t bother me anymore, but see this for more info: http://www.microsoft.com/technet/prodtechnol/winxppro/maintain/xpmanaged/26_xpmsg.mspx

it even works, that but can be done