Startup errors after changing security e-mail login

[nicolas.ruchti]

Since beginning 2018 my e-mail has changed. So I wanted to apply this change to my Autodesk account too.

Unfortunatly when I modify in the security setting the field  "e-mail address" from the old security e-mail in domaine ".com" to the new one in domaine ".design", I constantly have problems when starting Fusion 360.

These messages appeared at startup which are related to this issue:

• Cannot switch to online mode either. Please check you internet connection. Application will exit now.
• You have been working in offline mode for more than the allowed periode of 2 weeks. Application will go online now.
• Stuck at message: Hold tight... Just another minute as we finish setting up Fusion 360. 
• Server Error: 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.
• Invalid GUID. Could not identify oxygen user for [G7CYQQUKQRBE]....
• Sign in Failure: There was an error while loggin in to Fusion 360. Follow this Support Article for possible solutions to this login issue.

Without success I checked several advices like:

• Proxy issues: I don't use a Proxy
• Clean uninstall of fusion 360. And reinstall
• Firewall setting: opening ports for Autodesk/Fusion 360
• Run F360 on another PC  with other windows version

Questions:

• What should be the exact workflow when changing the security e-mail? (close F360 instance bevore changing, log out in F360 instance  bevore changing, etc.)
• Is the issue related with the unusal domain ".design"?
• After cleand unistall. Is my old e-mail still stored somewhere in the PC?
• I've got the same issue on two differen Windows PC. Can it be that some disturbing residual information of the old e-mail is kept in the Autodesk Login Server ? 

[nicolas.ruchti]

As Workaround, I rolled back to the old security e-mail from domain ".design" to  ".com". I've used successfully this workaround several times since summer 2018. But I want to get rid of this old e-mail once.

I've managed to use security login e-mail ".design" without errors during a while. Then after a new F360 update, the startup problems appearded again.