Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

A Microsoft 365 group is different from a contact group (formerly called a distribution list). A contact group is a set of email addresses that you can use to send an email message or meeting invitation to everyone at once. To create a contact group, see Create a contact group.

Contact Microsoft Support. Find solutions to common problems, or get help from a support agent.

How to request a read receipt and/or delivery receipt in new Outlook. In a message you're composing, go to the Options tab on the ribbon. In Tracking on the ribbon, select the Request a Delivery Receipt box and/or the Request a Read Receipt box.

If your system is asking you for your BitLocker recovery key, the following information may help you locate your recovery key and understand why you're being asked to provide it. Important: Microsoft support is unable to provide, or recreate, a lost BitLocker recovery key.

好友列表显示你的 Xbox 好友的当前动态，并允许你与他们进行互动。. 直接跳转进入文本聊天或群聊天（一对一或在组中），加入好友的电脑游戏或邀请他们加入你的游戏，并查找要关注的人。. 查找好友：. 按 Windows 徽标键 + G 打开 Game Bar。. 选择 小组件菜单 ...

Open the message that you want to recall. You must double-click to open the message. Selecting the message so it appears in the reading pane won't allow you to recall the message. If you have the Classic Ribbon, from the Message tab, select Actions > Recall This Message.

请确保将音频输入和输出分配给要用于群聊天的音频设备。 在 “群”小组件中，选择 “群”选项 … 按钮，然后选择“群”音频。 在“音频”输出和“音频”输入下，从选择下拉列表中选择音频设备。

The first step to use S/MIME is to obtain a certificate from your IT administrator or helpdesk. Your certificate might be stored on a smart card, or might be a file that you store on your computer. Follow the instructions provided by your organization to use your certificate. Install the S/MIME control.

在 Lync 中，群組是您建立的連絡人集合，讓您可以快速在顯示中查看多位連絡人，或同時與他們進行通訊。 您決定您需要的群組以及群組的成員。