: Log into your Microsoft Account Dashboard to ensure your subscription is active and not expired.

Each individual user can install apps on up to 5 concurrent devices. 2. Business and Enterprise Plans Activate Office for Windows - Microsoft Support

: Open any Office app, go to File > Account .

: Go to Control Panel > Programs and Features , right-click Microsoft 365, and select Change > Online Repair .

You have installed Office on the maximum number of computers allowed (usually 5). Solution:

If you encounter issues such as an "Activation Loop" or "Service Unavailable":

If standard troubleshooting fails, Microsoft provides a free tool called .