We have added a new verified domain added, let us call it Domain2.com and have renamed most users accounts from user@domain1.com to user@domain2.com. Some are still trying to use their old accounts to log in therefore new duplicate accounts are being created: user@domain1.com.
We want to prevent @domain1.com accounts from being created, but still, allow existing @domain1.com accounts to work until we change them.
Can Domain1.com be removed from Approved domains under Site Access, without affecting Domain1.com users?