Convert a mailbox in Exchange Online

You can use the Exchange admin center (EAC) for the following types of mailbox conversions:

  • User mailbox to shared mailbox.
  • Shared mailbox to user mailbox.

Other types of mailbox conversions require Exchange Online PowerShell:

  • User mailbox to resource (room or equipment) mailbox
  • Shared mailbox to resource mailbox
  • Resource mailbox to user mailbox
  • Resource mailbox to shared mailbox

What do you need to know before you begin?

  • Estimated time to complete: 5 minutes.

  • You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Recipients" entry in the Feature permissions in Exchange Online topic.

  • If your organization uses a hybrid Exchange environment, you need to manage your mailboxes using on-premises Exchange management tools.

    • To convert a mailbox in a hybrid environment that was provisioned in Exchange Online but not migrated, you need to convert the remote mailbox object using the Exchange Management Shell in on-premises Exchange:

      Set-RemoteMailbox <MailboxIdentity> -Type <Regular | Shared | Room | Equipment>
    • If the mailbox was previously migrated to Exchange Online, you also need to update the mailbox object in Exchange Online. For more information, see:

Use the Exchange admin center to convert a mailbox

  1. In the EAC, go to Recipients > Mailboxes.

  2. Select the mailbox that you want to convert.

  3. From the More actions pane, click Convert to regular mailbox or Convert to shared mailbox.

  4. In the pane that opens up, select Confirm.

    The mailbox is converted from its present type to its other type, and the notification message Mailbox converted successfully is displayed.

Use Exchange Online PowerShell to convert a mailbox

To convert a mailbox, use the following syntax:

Set-Mailbox -Identity <MailboxIdentity> -Type <Regular | Room | Equipment | Shared>

This example converts the shared mailbox named MarketingDept1 to a user mailbox.

Set-Mailbox -Identity MarketingDept1 -Type Regular

For detailed syntax and parameter information, see Set-Mailbox.