Which app is behind this EWS application ID?
Paste an application ID from the Exchange Web Services usage report in the Microsoft 365 admin center, or type an app or vendor name. You get the app, the vendor, and, where the vendor has published one, its plan for moving off EWS before full retirement of EWS in Exchange Online begins on 1 April 2027.
Know this app?
Tell us what it is and it will be added after a check against a public source.
Some apps register in your own tenant, so their ID is different everywhere (Veeam, BitTitan and others). LazyAdmin's table of tenant-specific apps says where to find each one.
3,479 application IDs, each with its source. Updated 2026-11-04.
Load your EWS usage report free and see every app in it. $49 per tenant adds each vendor's migration status, which apps are missing from your allow list, and the script that adds them.
- Your report stays in your browser
- Sources linked
- Plans: Polar as merchant of record, 14-day refund
Planning for 1 April 2027?
Full retirement of Exchange Web Services in Exchange Online begins on 1 April 2027, and since October 2026 apps not on an affected tenant's EWS allow list may lose access to EWS. The tenant plan reads your EWS usage report in your browser and gives you, for every app in it:
- the vendor and, where the vendor has published one, its plan for moving to Microsoft Graph, with the date and a link to the notice;
- whether each app is on your allow list, so you catch apps the automatic list did not include;
- a downloadable plan you can re-run until 1 April 2027.
$49 per tenant, or $199 for ten tenants with a view across all of them. See pricing.
Vendor statuses so far: 186 products from 150 vendors, each with its source linked and the day it was read. Vendor checks by date.
Background: EWS retirement dates, the EWS usage report, EWSAllowedAppIDs.
Browse the 872 application ID pages by app name: 1 2 3 4 5 6 7 8 9.