Following are the steps of Exchange 2010 to 2016 migration
There are several things to consider before moving the mailboxes from Exchange 2010. First, you have to install the new server with Exchange Server 2016 and all the updates. Next, you must install the needed certificates and set them in place. Also, ensure that the new receive and send connectors are correctly configured and tested. Lastly, update all the URLs of virtual directories such as Outlook Anywhere and OWA. If all these are correctly done, you can move to the actual mailbox migration process. The steps are as follows:
Launch Exchange Admin Center (EAC) and sign in with correct credentials.
Go to Recipients, click on Migration, and then select ‘Move to a different database’.
Select the ‘Select the users that you want to move’ option and then add users in the Select Mailbox window.
Note: Alternatively, you can select ‘Specify the users with a CSV file’ to migrate mailboxes in bulk.
Once all the users are added, click on the Next button.
Enter a name for move mailbox operation.
Click on Move the primary mailbox and the archive mailbox if one exists under Archive.
Click on browse to select the Target Database where the mailboxes will move on the new Exchange Server 2016, and click Next.
Enter the user details to which mailbox move reports are to be sent.
If you want to automatically migrate mailboxes, select Automatically start the batch. Also, select Automatically complete the migration batch under preferred option to complete the batch.
Click on New.
For Manual Batch Selection:
In case, you have selected the Manually select the batch later option available under referred option to start the batch, follow the given procedure:
In Recipients, click on Migration and manually select the mailbox migration batch that needs to be moved, and then click on Complete this migration batch under details pane.
Next, click on Recipients and then click on Migration, and check mailbox migration status in the details pane via selecting the desired migration batch.
Next, click on View Details, if you wish to access more detailed information.
When the migration of all databases is done, the last step is to decommission the Exchange Server 2010. However, before doing so, take care of some other things, such as:
Pointing the router to the new Exchange Server.
Pointing the external domain DNS to point to the new server if you have a different external IP address for the server.
Point the scanners and multifunction printers to the new server while creating the receive connector to give permissions to the devices to relay through the server. Get to know more about Microsoft 365 migration in detail.
I hope this method will be helpful!