This breach allegedly exposed up to 2.9 billion records with highly sensitive personal data of up to 170M people in the US, UK, and Canada (Bloomberg Law). This article provides detailed information about the breach, the data exposed, and recommended actions to help you stay safe.

If you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out, here are some solutions.

To get the attention of an entire group, type. @<team name> to notify everyone on that team. @<channel name> to notify everyone in that channel. If you're in a chat rather than a channel, you can notify everyone in the chat by typing @everyone in your message.

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

Customer service phone numbers. For help, follow the Get help link below. Describe your problem, and we'll provide self-help or connect you to the most appropriate support, which may include chat or request a call — we’ll call you, so you don’t have to wait.

Learn more about our Xbox subscription refund policy. You can receive a refund within 30 days of your initial purchase or before your first recurring billing date (whichever is sooner) by canceling your subscription in the steps that are outlined in the section “Canceling a subscription.”.

社区可帮助你提出和回答问题、提供反馈，并听取经验丰富专家的意见。

To capture someone's attention in an email or meeting invite, type the @ symbol followed by their name within the message or invite. Doing so will highlight their name and prompt Outlook to add them to the To line, ensuring they notice, and add the @ symbol next to their message in the Inbox.

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.

In order to use the features enabled by your assigned Copilot license, you'll need to switch to Current Channel or the Monthly Enterprise Channel. For assistance with getting your device moved to the correct Microsoft 365 update channel, contact your internal help desk or technical support.