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To fix M365 account issue for Trusted Platform Module (TPM) malfunction with the error code 80090016

Open Command Prompt as Administrator:
- Click on the Start menu, type cmd, right-click on the Command Prompt and choose “Run as administrator”.
- Alternatively, press Windows Key + X and select “Windows PowerShell (Admin)” or “Command Prompt (Admin)” from the menu.
Unregister the Device from Azure AD/AD (dsregcmd /leave):

In the administrative Command Prompt or PowerShell window, type dsregcmd /leave and hit Enter.
This command will unregister the device from Azure AD/AD.

Reboot the Device (Optional but Recommended):

It’s a good practice to restart the computer after unregistering it before attempting to rejoin the directory. This ensures all changes are applied correctly.

Register the Device to Azure AD/AD (dsregcmd /join):

Open an administrative Command Prompt or PowerShell window again after the reboot.
Type dsregcmd /join and hit Enter.
This command will register the device with Azure AD/AD.