Your Excel.
Meet Atlas.

Microsoft needs an app registration for Atlas. These settings belong to your Atlas account. Enter them here; you do not need to send credentials in chat.

1. Open Microsoft Entra → App registrations and choose New registration. Name it CAT Atlas – Excel and select Personal Microsoft accounts only. If you already registered the app, use that registration.
2. Choose the Web platform for the redirect URI and paste this exact address:
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   Use the Web platform when registering this server connection.
3. Under API permissions → Microsoft Graph → Delegated permissions, add Files.Read, User.Read and offline_access. Atlas asks to read files and keep its connection; it does not request file editing permission. Microsoft’s file permission covers your files, although this test reads only the workbook you choose.
4. Under Certificates & secrets, create a client secret. Copy its Value. From Overview, copy the Application (client) ID into the fields below. Personal account sign-in does not need a Directory (tenant) ID.

Application (client) ID Client secret valueEncrypted on the server. The saved secret is never returned to this page. Replacing these settings disconnects the current Microsoft account. Save private app settings

Sign in with the personal Microsoft account that owns your tracker copy. Microsoft’s registration guide.