Guide

1. On the main dashboard of your Microsoft Excel workspace, head over to the top-right corner and click the 'Add-Ins' icon.

2. Following that, search for 'Trello' and then find 'Excel Send to Trello' from the suggested results. Click the 'Add' button next to it.

3. Tap the 'Next' icon to proceed.

4. Subsequently, click 'Sign Into Trello'.

5. Tap 'Log In' and then provide your Trello user credentials.

6. Finally, tap 'Allow' to agree with the terms and authorize the connection. After completing these steps, your Trello account will be integrated instantly with Microsoft Excel.