I use my Bootcamp partition as a VM as well as booting my machine in native Windows 10. Every time I switch mode I have to re-sign into my Microsoft, Apple, and Teamviewer accounts. I suspect something that "uniquely" identifies the system changes between the two modes of use. My first guess is the hardware ethernet address but I wanted to confirm that. Has anyone else had this issue? If so, did you find a solution? If you did, do you mind sharing it?