Office 2021 Office 2019 Office 2016 Microsoft 365 for home Office for business Office 365 Small Business Microsoft 365 admin Office 365 operated by 21Vianet Office 365 operated by 21Vianet - Small Business Admin Office 365 operated by 21Vianet - Admin More...Less If you get this error message, "Sorry it looks like you're on a slow connection…," Microsoft 365 is taking a really long time to install