After a brand new install of Windows 10, I try to sync my Office 365 Business Documents with my box, when I click the Sync Button, the Office 365 Log In Box prompt. I entered my credential and the sign in button is “stuck” nothing append.
To fix this you need first to kill in the Windows Tray the One Drive Business Icon and exist the apps.
Go to Control Panel, Internet Options, Security, Trusted Sites.
Add : https://365account-my.sharepoint.com and https://365account.sharepoint.com
Replace the “365account” with your current 365 Sharepoint URL.
Close the IE Option, Re-try the sync button with the credential and you will be good to go.