The workaround until we can resolve this with GoDaddy is to disable oAuth Exchange logins on your computer, then setup the account again.
To do that close eM Client, then in Windows click on the Start button and type regedit and select Registry Editor (Desktop app) from the results
Go to Computer\HKEY_CURRENT_USER\Software\eM Client
Click on Edit > New > DWORD (32-bit) value.
Name it AllowExchangeOnlineOAuth
By default it should be set to 0, if not change it to 0
Start eM Client and add your GoDaddy account.