How to convert a user mailbox to a shared mailbox in Exchange Online

  • Last update on October 18th, 2023

Here are two methods to convert a user mailbox to a shared mailbox in Exchange online:

1. Using Microsoft 365

You can convert a user mailbox into a shared mailbox in Exchange Online using:

  • Exchange admin center: Recipients > Mailboxes > Convert to Shared Mailbox
  • PowerShell.
Set-Mailbox -Identity <MailboxIdentity> -Type Shared

For more information check the Convert a mailbox in Exchange Online article.

2. Using CoreView

Follow the steps below to convert Exchange user mailboxes to shared mailboxes using CoreView:

  • Go to the CoreView Portal.
  • Select ACTIONS > Management Actions > Mailbox > Convert to shared mailbox.
  • Select one or more user mailbox(es) or upload a CSV file with the list of targets.
  • Click Continue > Proceed.
  • Verify if everything is in order and write notes to track additional information related to this change (e.g., ServiceNow ticket number, reason for the change), which will be tracked on the CoreSuite side. 
  • The user mailboxes will then be converted to shared mailboxes.

Operators will only be able to view and manage mailboxes that are part of their defined V-Tenant scope.


With CoreSuite, you can manage every aspect of mailbox permissions, as well as easily create, manage, monitor, and delete mailbox objects and their configurations, all within the scope of your V-Tenant.

CoreSuite is an advanced Microsoft 365 tool offered by CoreView, used for reporting, managing, monitoring, auditing, and automating activities on your tenant. It simplifies daily activities while ensuring safer and more compliant management through tenant delegation, granular permission control, license optimization, and workflow automation.

Visit our main website for more information.