Try to prevent Classic Teams to start up by Intune management but get stuck at Intune.

In order to prevent that the Classic Teams starts up at starting up ias I start my laptop, the way to do this is via Intune. However with my current account I cannot login with my hotmail account - User account '@hotmail.com' from identity provider 'live.com' does not exist in tenant 'Microsoft Services' and cannot access the application ''(Microsoft Intune portal extension) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account.

The account is linked with a paid O365 subscription. but cannot manage the Classic Teams (which is obsolete) to start up every time. How to manage to get in Intune and prevent the message that I haven't access to Intune ?