Thank you for the info. Thats not something I had considered when I installed and started using the google authenticator. So needles to say, as I'm reading your post a sense of fear starts to take hold as I begin to imagine the time when something "will" go wrong.
Fortunately, when I was installing the 2fa, in my confusion, I installed the Authy app also. I even went as far as putting the exchange on both Google and Authy. I just tried to sign in using the Authy 2fA and was successful. He breaths a sigh of relief.
I'm relatively new to the space, so the information/learning has been never ending. The amount of stuff I don't know (but should know) is massive. You have just added to the pile, and for that I thank you. I will immediately begin to further educate myself in 2FA contingencies in preparation of the possibility that my device is lost, stolen, or fails. Again, Thanks