MC1058261 - New Microsoft Outlook: Changes to how shared mailboxes are displayed in the folder pane

Coming soon for new Microsoft Outlook for Windows desktop: To align with the behavior of classic Outlook for Windows, we will display shared mailboxes in the same way accounts are displayed and add a Shared icon to give users a visual distinction between standard mailboxes and shared mailboxes.

This message is associated with Microsoft 365 Roadmap ID 486837.

When this will happen:

Targeted Release: We will begin rolling out early May 2025 and expect to complete by late May 2025.

General Availability (Worldwide): We will begin rolling out early June 2025 and expect to complete by late June 2025.

General Availability (GCC): We will begin rolling out early July 2025 and expect to complete by late July 2025.

How this will affect your organization:

After this rollout, shared mailbox users and delegates will no longer have a Shared with me section in the folder pane on the left of the screen. Shared mailboxes and shared folders will display at the same level as accounts in the folder pane. Users will also see a teaching message pointing to the new shared mailboxes and shared folders, so users are not surprised by the change. Users will not lose any shared mailboxes or shared folders.

Left: The Shared with me section before the rollout. Right: After the rollout:

This change will be on by default.

What you need to do to prepare:

This rollout will happen automatically by the specified dates with no admin action required before the rollout. You may want to notify your users about this change and update any relevant documentation.

Learn more: Open and use a shared mailbox in Outlook - Microsoft Support (will be updated before rollout)

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