Mamy connections from adress IP

[inomi]

I have an issue because every day I receive from lfd information about overload my server and logs shows me many connections from Microsoft adress IP. Manual block IP isn’t good because every day is another IP. In Csf I have set two parameters: CONNLIMIT 80;50,443;50 i PORTFLOOD 80;tcp;100;60,443;tcp;100;6 but it doesn’t work. Could you give me any suggest how to resolve this an issue?