Hi Dataprise Admin,
Thanks for posting in the community.
The ability to sync DL's exists in Office 365's new enhanced provisioning functionality (formerly called v2 Provisioning). We currently have this scheduled to enter the Early Access program from the middle of next week.
Once it's EA, the support team with be able to turn the flag on for you which will make the setting available, though nothing will happen until you actually make the configuration change in the Provisioning tab of the O365 App.
In many environments, this can be a pretty significant change, so we recommend considering assistance from Okta's services group as part of the change over.