I saved my microsoft data to my google drive before I reinstall my MAC systerm. And I download new Microsoft office to reinstall it. 
Now I still can find the message in google drive in my computer but I just cannot reopen it with outlook, it is said it is not associated with the identity. 

Actually, those emails I saved was from Yahoo China, which has stopped its mail service in this August, so the emails saved are very important to me.
Meanwhile, dose this will cause the problem that I cannot use outlook to reopen it anymore since yahoo china mail does not work anymore?

If it is still can work, how to deal with this?

I have tried to launched outlook with Option key, and there is only one default identity to choose, which means I do not need to delete any useless identity. But I really have no clue about what to do with this. 

I wish there is someone can be my lifesaver, seriously.............

Thank you .