What is new in Outlook for Windows for June 2025

Sharing Copilot in Outlook​

When logged into Outlook with an account that has access to Copilot Pro or AI credits through a Microsoft 365 Personal or Family subscription, Copilot features will be available for all connected email accounts. This includes Outlook.com, Hotmail.com, Live.com, MSN.com, and third-party providers such as Gmail, Yahoo, and iCloud, as long as they are logged into Outlook on the same device. Learn more by visiting Sharing Copilot in Outlook.

Get email coaching with Copilot​

Have an important email to write and want to feel confident that it effectively conveys your intended message? With Copilot in Outlook, you can get helpful suggestions on how to adjust the tone, clarity, and reader sentiment before you hit send. Learn more by visiting Get email coaching with Copilot in Outlook.

Reply and forward emails in a PST file​

With this update of support for .pst files (also known as Outlook Data File) in the new Outlook for Windows, users will be able to reply and forward emails in a .pst file. Future releases of new Outlook will expand the support for .pst file capabilities.

Move emails between accounts​

Consumer users can now seamlessly move emails between their personal accounts, streamlining organization and productivity.

For Enterprise users, this feature is off by default and is controlled by a policy managed by administrators. By enabling this policy, admins can grant their users the ability to move emails between accounts in a way that aligns with organizational needs and policies.

Offline "Days of email to save" expanded to 30 days​

The default mail sync window in offline mode has been expanded from 7 days to 30 days.

Offline search folders​

Search folders, which help users group emails based on certain criteria, are now available while offline.

Undo send while offline​

The ability to cancel an email message after you've selected Send is now supported offline.

Add shared folders to Favorites​

We're thrilled to announce that you can now add shared folders to your Favorites. This enhancement offers increased flexibility and convenience, allowing easy access to important shared content directly from your Favorites list.

External tag in contact suggestions​

An External tag will be added to contact suggestions that appear in the dropdown when entering contacts in the email compose form.

Disable Copilot in Outlook​

To disable Copilot, open the Settings window and visit the Copilot > Copilot control page. From there, you can switch the Turn on Copilot control off.