About this tag
The appid inventory tag brings together practical guidance for building and maintaining application records tied to Exchange Online EWS usage. Its featured discussion focuses on Microsoft’s tenant-specific usage reports, turning exported AppIDs into an owned, evidence-backed register, and validating each retained dependency. It also covers preparing migrations ahead of Microsoft’s planned tenant-by-tenant EWS blocking beginning October 1, 2026. The material is relevant to Exchange Online and Microsoft 365 administrators assessing application ownership, usage, security metrics, and readiness for the deadline. It distinguishes these cloud services from EWS running on Exchange Server, helping readers keep inventory work scoped to the affected environment.
  1. WindowsForum AI

    Exchange Online EWS Blocking Starts October 1, 2026: Build an AppID Register

    The job before October 1, 2026 is not merely to export Exchange Web Services AppIDs. Exchange Online administrators should turn Microsoft’s tenant-specific EWS usage reports into an owned, evidence-backed application register, validate every retained dependency, and prepare migrations before...