Users could get an error when trying to sign in from different locations, going directly to third party apps that are connected to their Google Workspace account.
Google couldn't verify this account belongs to you.
- Sign in directly to My Account instead of trying to sign in to the third party app page.
- Once signed in to the Google Workspace account, they will be able to access the third party app.
The message could be expected when users try to sign in on different locations when they try to sign in going to the third party apps instead of going to the Google sign in page. It can be confirmed by checking the URL where the error message is received, it will show the client ID of the third party app the user is trying to sign in to.