Convert User Mailbox to Shared Mailbox

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Shared mailbox is a mailbox which is accessed by multiple users at the same time. You can accomplish this by creating a shared mailbox or by creating a user mailbox. You can use user mailbox as shared mailbox by providing required permission to multiple users to access the mailbox. Email addresses like info, can be configured as shared mailbox. However, you also have option to convert user mailbox to a shared mailbox. In this post, I will show steps to convert user mailbox to shared mailbox. A shared mailbox is a user mailbox whose user account is disabled in active directory and you can’t login to shared mailbox directly.

Convert User Mailbox to Shared Mailbox

Log on to Exchange 2016 and open Exchange Management Shell (EMS). Type following cmdlet to convert a user mailbox to shared mailbox.

[PS] C:\Windows\system32>Set-Mailbox AJones -Type shared

To view the shared mailbox, log on to EAC. Go to recipients > shared.

Convert User Mailbox to Shared Mailbox

Now, open the properties of the shared mailbox by double-clicking it and assign permission to users.

mailbox delegation

After assigning permission click save. In this way you can convert a user mailbox to shared mailbox. Now, if you open Active Directory Users and Computers snap-in, you will see the user AJones is now disabled. That’s because shared mailbox have disabled user account and you can’t login to it directly.

user account disabled

You can also convert shared mailbox back to user mailbox. Type following cmdlet in EMS.

[PS] C:\Windows\system32>Set-Mailbox AJones -Type regular

You may have to reset user password before you enter above cmdlet if you are converting a fresh shared mailbox to user mailbox.

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Bipin is a freelance Network and System Engineer with expertise on Cisco, Juniper, Microsoft, VMware, and other technologies. You can hire him on UpWork. Bipin enjoys writing articles and tutorials related to Network technologies. Some of his certifications are, MCSE:Messaging, JNCIP-SEC, JNCIS-ENT, and others.

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