Microsoft Outlook
Microsoft · 5d661950-3475-41cd-a2c3-d671a3162bc1
- Application ID
5d661950-3475-41cd-a2c3-d671a3162bc1- Application
- Microsoft Outlook
- Vendor
- Microsoft
- Publisher
- Microsoft first-party
- Uses EWS
- Yes, per a public source
- EWS status
- Migration announced
- Vendor notice
- https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-ews-exchange-online
What to do
Seen calling EWS, likely for calendar status. Microsoft says it is removing EWS dependencies from Outlook; update Outlook clients.
Sources
- merill/microsoft-info, MicrosoftApps.csv (MIT), origin Graph, read 2026-10-14
- How to Find Active EWS-Based Apps in a Microsoft 365 Tenant (Office 365 for IT Pros) (2025-04-29), read 2026-10-14
- https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-ews-exchange-online, read 2026-10-14
Last updated 2026-10-14.