Hi Support,
Our AD and On-premise exchange server have multidomain user mailbox. We setup AADC and Exchange hybrid to migrate one of the domain to exchange online.
Now, the migration is completed. All of that domain mailbox are moved to Exchange online. We need to disconnect the relationship of on-premise exchange and exchange online. And both EXO and on-premise exchange mailbox should sent to others and internet normally.
I study this documents but not fit our scenario (https://docs.microsoft.com/en-us/exchange/decommission-on-premises-exchange).
What is the best sequence on our case? Do below sequence correct?
Change that domain MX record to EXO > Remove Exchange Hybrid server > Disable directory sync to convert sync user to cloud user > Remove AADC ?
Thank
Chong