Repair Outlook Data Files (.pst and .ost) - Microsoft Support
All Outlook Data Files (.pst) and Offline Data Files (.ost) are listed along with the name of the account the files are associated with. If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
File sharing over a network in Windows - Microsoft Support
File sharing over a network in Windows. Windows 11 Windows 10. Note: This article focuses on how to share files or folders over a Local Area Network (or LAN), such as connected computers within your home or workplace.
Fix OneDrive sync problems - Microsoft Support
Support for the old OneDrive for Business sync app with SharePoint Online has ended. If you see this icon in your taskbar, read this article to learn more. Learn how to fix common OneDrive personal or OneDrive for Business sync problems.
Applies To:
OneDrive for Business, SharePoint Server Subscription Edition, SharePoint Server 2019, SharePoint Server 2016, SharePoint Server 2013 Enterprise, SharePoint in Microsoft 365, Office for business, Office 365 Small Business, Microsoft 365 admin, OneDrive (work or school), OneDrive (home or personal), OneDrive (work or school) operated by 21Vianet, OneDrive for Mac, OneDrive for Windows, SharePoint admin center, SharePoint in Microsoft 365 Small Business
Reduce the size of your mailbox and Outlook Data Files (.pst and .ost)
To reduce the size of your Outlook Data File (.pst) or Offline Outlook Data File (.ost), you can manually compact the data file. Select your version of Outlook below to see instructions on how to reduce the size of a .pst or .ost file.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013
Sync your account in Outlook to the Microsoft Cloud
To enhance your Microsoft 365 experience in new Outlook for Windows, Outlook.com, Outlook for iOS, Outlook for Android, and new Outlook for Mac, you can now sync your non-Microsoft accounts (including their emails, contacts, and events) to the Microsoft Cloud.
Applies To:
Outlook 2021 for Mac, Outlook 2019 for Mac, Outlook.com, New Outlook for Windows, Outlook for Android, Outlook for iOS
32-bit and 64-bit Windows: Frequently asked questions
Find out how to choose between the 64-bit or 32-bit version of Office. Get answers to some common questions about 32-bit and 64-bit versions of Windows.
Mailbox storage limits in Outlook - Microsoft Support
Outlook accounts can have up to 100GB of storage per mailbox ( Exchange Online mailbox storage limits ). Administrators can reduce maximum mailbox sizes per user or globally, see: How to set Exchange Online mailbox sizes and limits in the Microsoft 365 environment for details.
Applies To:
Outlook Web App for Office 365, Outlook Web App for Office 365 Small Business, Outlook.com, New Outlook for Windows, Outlook on the web for Exchange Server 2016, Outlook on the web for Exchange Server 2019, Outlook Web App
Sent email in Outlook.com comes back "delivery failed"
Sent email in Outlook.com comes back "delivery failed". When you send an email and receive a delivery failure message, there could be several reasons. We've listed the most common error messages below, along with suggested resolutions. Select an error below to see more information.
Applies To:
Outlook.com
KB4023057: Update Health Tools—Windows Update Service components
Microsoft Update Health Tools is offered to devices through Windows Update as update KB4023057. This update is applicable for both Windows consumer and commercial devices, with a slightly different purpose and functionality. On Windows consumer devices, this update helps remediate smooth functioning of Windows Update.
Microsoft Store 无法打开 - Microsoft 支持
如果在启动 Microsoft Store 时遇到问题，可以尝试以下方法：. 重置 Microsoft Store 缓存：按 Windows 徽标键 + R 打开“ 运行 ”对话框，键入 wsreset.exe ，然后选择“ 确定 ”。. 注意: 将打开一个空白的“命令提示符”窗口，在大约 10 秒钟后，该窗口将关闭并自动打开 ...