Download and install or reinstall Microsoft 365 or Office 2021 on a PC ...
Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.
Applies To:
Office 2021, Office 2021 for Mac, Office 2019, Office 2019 for Mac, Microsoft 365 for home, Office for business, Office 365 Small Business, Microsoft 365 admin, Office 365 operated by 21Vianet, Office 365 operated by 21Vianet - Admin, Microsoft 365 for Mac, Office 365 Germany - Enterprise, Office 365 Germany - Enterprise admin
Add or manage an iCloud email account in Outlook
The steps below will help you add an iCloud account to new Outlook, or manage an existing account by deleting it or making it your primary account. Note: If the steps under this New Outlook tab don't work or your version of Outlook looks different than what's shown, you may not be using new Outlook for Windows yet.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, New Outlook for Windows
OneDrive release notes - Microsoft Support
Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge. Learn about the latest feature updates and bug fixes for the OneDrive sync app across all devices.
Applies To:
OneDrive for Business, SharePoint Server Subscription Edition, SharePoint Server 2019, SharePoint in Microsoft 365, Microsoft 365 admin, OneDrive (work or school), OneDrive (work or school) operated by 21Vianet, OneDrive for Mac, OneDrive for Windows, SharePoint admin center, SharePoint in Microsoft 365 Small Business, SharePoint operated by 21Vianet
Getting the most out of your PC backup - Microsoft Support
With your photos and files backed up in the cloud, you can quickly save, share, and edit them with OneDrive and Microsoft 365. Your changes will automatically sync across devices so you’ll be able to access the latest versions of your files anytime, anywhere.