How to install Office for iOS on your iPhone or iPad and use the apps with Microsoft 365.

Learn how to change your notification settings and quick actions using the notification center in Windows.

View usage information about your SharePoint site such as the number of people who have visited the homepage or a list of files that have received the most views.

Describes an update that adds TLS 1.1 and TLS 1.2 to default security protocols in Windows Server 2012, Windows 7 SP1, and Windows Server 2008 R2 SP1.

Learn how to recover files that have been lost, deleted, or accidentally changed.

即使已开启其他防火墙，开启 Microsoft Defender 防火墙也很重要。 它保护你免遭未经授权的访问。 若要打开或关闭 Microsoft Defender 防火墙，请执行以下操作：

You can block messages from specific email addresses or domains from reaching your inbox. When you add an email address or domain to your blocked senders list, Outlook automatically moves messages from that sender to the Junk Email folder.

It's easy to attach pictures, files, and other items to your Outlook messages. Outlook keeps track of the documents you’ve recently worked on, whether they're stored on your computer or saved in OneDrive (cloud only).

Learn how to join a Microsoft Teams meeting by link, calendar, channel, chat, or by calling in.

For more information about how to customize the ribbon, see Customize the ribbon in Office.. When custom groups show a green or blue ball on the Quick Access Toolbar. Icons represent custom groups of commands on the Quick Access Toolbar when an icon is chosen.