Hi, I'm John! I will help you with this.
That error message means the account is managed by an organization, and your access was blocked due to a policy violation. In cases like this, the administrator is the only person or team who can investigate the issue, lift the block, or give you alternative access to your files.
You will need to contact the IT or admin team for that account. Even if they’re hard to reach, they are the only channel who can restore access, Microsoft Support or users like us don’t have the ability to override an organization’s policies.
Let me know if you have any further questions or concerns.
Regards,
John J.D.