Changing users email domain from Security Console will have any impact?

Summary:

Because of organization restructuring, we are changing the email domain for few users. As the email in Active directory is changing, to facilitate SSO login, we are updating the email id attached to fusion users. Just wanted to get a confirmation or impact analysis, will this change in Email Address, has any downside impact on any Approvals or system notifications?

Because of the email domain change, users are not able to login to fusion. They only way we can restore their login by updating the email ID. But we wanted to make sure, this has no other impact.

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