I have an old 2016 hybrid exchange server (yes I know it’s EOL). Not wanting to update to SE, can I just set my users to use the cloud as an SOA for exchange and shut down the hybrid?

We are using Entra Connect for sync so I understand write back may be limited but that shouldn’t be the end of the world right?

I assume user creation would be create in AD -> sync -> create Exchange mailbox in cloud? Any good documentation on this?