Hi Linda,
I'm Sumit, here to answer your query at the Microsoft Community.
Are you asking to configure Phone Link app or reconfigure your Phone number with the Email address?
Right-click the App and choose App Settings.
Click Reset app.
https://support.microsoft.com/en-us/topic/phone...
Then,
Install or open the Link to Windows mobile app on your Android device. To do this, open a web browser on your Android device and then enter the link that's displayed on your PC (www.aka.ms/yourpc).
Sign in to the mobile app with the same Microsoft account that you signed in to on your PC.
Once you've signed in, go back to your PC, select the I have the Link to Windows app ready check box, and then select Pair with QR code.
Note: If you'd like to pair your device without using a QR code, select Pair manually on your PC instead. You'll be prompted to enter a code on your Android device.
A popup window with a QR code will appear on your PC screen.
In the mobile app on your Android device, select Link your phone and PC. When asked Is the QR code on your PC ready? select Continue.
You'll be asked permission for the app to access your camera. After accepting, an in-app camera will open. Use this camera to scan the QR code displayed on your PC.
After scanning the QR code, you may be asked for additional Android permissions. These permissions allow you to access content from your phone on your PC.
Follow the prompts on your Android device and then select Done. Then return to your PC to explore the Phone Link app.
Hope this helps.