In a previous article, we learned how we can create a user mailbox from scratch in Microsoft Exchange Server 2016. This article focuses on creating a mailbox from an existing account in Exchange Server 2016.
Create a User Mailbox from Existing Account in Active Directory
1. Choose Existing user
2. Click Browse and search the user by typing a name and then press Enter key from the keyboard when you are done.
3. Select the desired user and then click OK
4. Click Save and you are done.