Microsoft allows you to revoke an app’s permission to access OneDrive. This works differently in personal and business accounts.

Personal OneDrive accounts

  1. Go to https://account.live.com/consent/Manage. This page lists the apps and services you’ve given access to.
  2. Click Edit under the diagrams.net app.
  3. To revoke access permissions, click Remove these permissions.

Business OneDrive Accounts

  1. Go to your OneDrive Account Settings: click on My Account > App Permissions > Revoke Permission.
  2. Revoke the access permissions from this page.