09/10/2026
Still running on EWS? Action is required now.
From now (October 2026), Microsoft may begin disabling EWS by default in Exchange Online tenants. If you’re still running OnTime on EWS and haven’t added OnTime to your allowed app IDs, you need to do this now for your OnTime to keep running smoothly.
Read our detailed FAQ and watch our video guide here: https://support.ontimesuite.com/docs/faq-otms/add-ontime-to-ews-allowed-app-ids/