Updated May 28, 2025: We have updated the timeline below. Thank you for your patience.

By default, Microsoft Outlook for the web and new Microsoft Outlook for Windows support separating recipients by using either a semicolon or a comma. After this rollout, users can choose if a comma should be used as a recipient separator or if it should be allowed as part of the contact's name. This change is helpful for organizations where contacts use the "Last name, First name" format.

This message is associated with Microsoft 365 Roadmap ID 470020.