Hello @Plamen Bobtchev ,
Welcome to the MS Q&A Forum.
Could you please let me know on which exactly step you are getting this failure?
When registering a new Azure AD application, Veeam Backup for Microsoft 365 automatically grants the required permissions to this application.
To check API permissions, do the following:
- Sign in to the Azure portal.
- Go to Azure Active Directory > App registrations, and select an application.
- Select API permissions > Add a permission > APIs my organization uses.
- Select API in the list, check its permissions and configure them, if needed.
Hope this information will help you in your investigation.
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Sincerely,
Olga Os