How can I transfer an email account from Windows AD account to Azure AD account?

rpspiker 1 Reputation point

I am not sure where to ask this question. I inherited a client whose former IT setup all users in On-Premise AD, used Azure AD Sync to populate Azure AD and has all the email accounts in M365. Now the clients wants to shut down the On-Premise AD. To accomplish this it seems I need to delete the on-premise AD account, let Azure AD Sync update Azure AD then go back to M365 and create an account with the same name. How to I keep from losing the email and reconnect it to the new account?

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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