As of the last time I checked (6 mos. ago) there is still no supported managemenrt solution for Exchange Online without local Exchange if you migrated to Exchan

As of the last time I checked (6 mos. ago) there is still no supported managemenrt solution for Exchange Online without local Exchange if you migrated to Exchange Online via a hybrid migration. Some people just modify AD attributes directly to get around having an on-prem Exchange install but that's not officially supported.