Teams taskbar widget sign-in prompt without credentials

The Teams taskbar widget in Windows 11 displays a sign-in prompt even when the device has no Microsoft account or cached credentials.

The precise condition that causes the prompt to appear and the fallback UI that shows a generic 'Get started' button are undocumented.

We need to identify any supported or unsupported configuration that can suppress the prompt without removing the Teams application, while avoiding changes that could affect future Windows updates.

Testing must be performed on a non-production account, and any registry or policy modifications should be reversible.

What specific trigger determines the transition from cached credentials to the fallback UI? Is there a documented or supported setting to disable the widget for users without a Microsoft account? Does the behavior differ across Windows 11 builds?