Cutover Migration from Exchange 2016 to 365 - MigrationProvisioningPermanentException

1. Basic preparation 
Make sure Exchange 2016 has installed the latest updates 
Prepare a Microsoft 365 global administrator account 
Organize all the mailbox lists that need to be migrated 
2. Simple 3-step migration method 
Step 1: Set up the migration 
Log in to Microsoft 365 administrator center 
Enter into the "Exchange" > "Migration" page 
Select the "Clip Migration" option
Upload the CSV file containing the mailbox list 
Step 2: Start synchronization 
The system will start the initial synchronization automatically 
Wait for the synchronization to complete (usually a few hours for small mailboxes) 
Check whether there is any error message 
Step 3: Finish the switchover 
Arrange an out-of-work time slot 
Click "Finish Migration" button 
Update the DNS records to point to Microsoft 365 
Notify users to use the new mailboxes 
3. Checking after the Migration 
Check a few mailboxes randomly Check whether mailboxes are complete 
Test whether sending and receiving emails are normal 
Ensure all users can log in