Hi CharlieCY,
Welcome to Microsoft Community.
I'm Hahn and I'm here to help you with your concern.
I'm sorry to hear that you're experiencing difficulty signing in to Microsoft Edge with your Microsoft account. Here are some troubleshooting steps you can try to resolve the issue:
First, make sure you have the latest version of Edge installed on your device. You can check for updates by going to Settings and more > Help and feedback > About Microsoft Edge. If there is an update available, it will be downloaded and installed automatically.
Reset your Microsoft account password. This can help if you have forgotten your password or if your account has been compromised.
Try signing in with a different Microsoft account or create a new one. This can help you determine if the problem is with your account or with Edge.
Sometimes, a corrupted user profile can cause sign-in issues. You can try creating a new user profile and see if Edge works there. Create a local user or administrator account in Windows - Microsoft Support
If none of these steps work, you can contact Microsoft Live Chat Support Staff for further assistance. You can find the contact information at [Contact - Microsoft Support].
I hope this helps you resolve your issue. Thank you for using Bing. Have a nice day!
Your Sincerely
Hahn - MSFT | Microsoft Community Support Specialist