Microsoft Graph: Graph API – New Outlook for Windows usage
New Outlook for Windows usage will be added to the Microsoft Graph API, allowing organizations to monitor the adoption and usage of the new Outlook for Windows client within their organization. This will facilitate the creation of customized reports and analytics. Metrics included in the Graph API will match those available in new Outlook for Windows usage of Microsoft 365 apps usage report in the Microsoft 365 admin center, including tenant-level count of active users who have transitioned from Outlook for Windows (classic) to the new Outlook for Windows, as well as flags indicating usage of the new or classic Outlook per user over the specified time period.

| Product | Microsoft Graph |
|---|---|
| Release phase | General Availability |
| Release date | June CY2025 Preview date: March CY2025 |
| Platform | Web |
| Cloud Instance | Worldwide (Standard Multi-Tenant) |
| Created | 2025-01-16 |
| Roadmap ID | 475245 |
| Roadmap Link | https://www.microsoft.com/microsoft-365/roadmap?featureid=475245 |

HANDS ON tek
M365 Admin


