[jgch]

Yesterday night, I happily updated my Lumia 930 to W10M. BIG MISTAKE!
This is my company phone - hence a work tool that supposed to WORK.

After the installation, all account configurations were gone!
Is there a rational reason for that?
Can these accounts be recovered?
The Exchange Client for some reasons no longer works with Google Apps accounts. WHY?

[Captain_Eric]

Did you hard reset after update? If not try that. Also, do not restore your phone and apps, instead start clean, reinstall them all one by one. Yup, it's a slow processes, but many people say it's the best way.