If you already using Authy to authenticate your other online accounts, you can use it for your Microsoft account as well.
To use Authy, open your browser and go to mfa.abwe.org
Log in if prompted.
Select "Mobile app" from the drop down and be sure to select the option to "Use verification code".
Click "Set up".
Click "Configure app without notifications"
Open your Authy app and select the three dots and choose "Add Account"
Select "Scan QR Code" and scan the barcode on your computer screen.
You Microsoft account will now be added to Authy.
Please let us know at itsupport, if you need additional assistance.