pppoe change profile base on time without restart mikrotik

if someone can help me
i am facing a problem that i give a company 1Mbps speed but i need to limit speed from 5:00 pm to 7:00 am
because they are consuming a lot of connection @night

can someone help me wit ha detailed solution please???
if it can be done using winbox it is more easy to me…

When you change ppp profile, changes are not applied to already logged in users. So you have to do changes and then force user to disconnect.