Get time from Active Directory - isolated network

I need to be sure time sync works in a disconnected AD domain with Linux (Red Hat) guests. These guests are RHEL 7 & 8 . They use adcli and sssd. I really don't care about correct time as much as I care about consistent time. So my best guess is set the PDC emulator to get time from CMOS clock and all other Windows machines will synch with this. As far as Linux goes I need to know what Linux uses to synch time in an AD domain. Is there a component of sssd that uses w32tm or is Linux strictly ntp with AD?

Then the next question is how to configure Linux clients to get time from the PDC emulator?

TIA!