Accessing Microsoft Teams using organizational or personal credentials
I got mine to stop crashing on the iphone, i had tried everything in this thread and then some.
went to my teams on the win10 desktop
uninstalled all of the apps that i could (some could only be unpinned, but others also had an uninstall option)
i wasnt using any of those, but i suspect they were added by my organization.
anyhow, that fixed it. i suspect the iphone app was trying to sync or access those apps and getting confused
that or i did this at the same time MS fixed it in the background ... dont care ... it works :)