Hi Shaun, 

I wanted to let you know that I moved this reply to its own thread, as this does not appear to be related to the issue with the services not starting after upgrade. We prefer to keep threads related to one topic so details aren't lost or compounded. 

If you'd like this to be reviewed by the Support Department, please do submit a ticket as well. 

Kind regards,

Shaun, one thing that could cause this is something locking or otherwise causing issues with the domain's accounts.json file. A lot of the time this is an antivirus or backup solution which is hanging on to the file and preventing us from accessing it successfully. If you get a support ticket submitted on this I can help you track down what might be locking files via Process Monitor from Microsoft. I hope that helps!