Look up an EWS application ID
Paste one or more application IDs from the EWS usage report in Microsoft 365 admin center, or from EWSAllowedAppIDs. You see which ones belong to Microsoft or a known vendor, and who has to move each one off EWS. The lookup is free and needs no sign-up.
One ID per line or separated by commas. Rows of the usage CSV work too when you include its header row.
The IDs stay in this browser. The page downloads the lists and searches them here, and nothing you paste is uploaded.
Microsoft application names: merill/microsoft-info by Merill Fernando, MIT license.
Your EWS app list explains what to do with each kind of application. Which applications still use EWS in your tenant has a script that names the IDs from your own directory.