Certificate authority (CA) A certificate authority is an entity similar to a notary public.It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.

Driver updates for Windows 10 and many devices (such as network adapters, monitors, printers, and video cards) are automatically downloaded and installed through Windows Update.

The notification area is located at the right end of the taskbar. It contains icons you might find yourself selecting or pressing pretty often: battery, Wi-Fi, volume, Clock and Calendar, and action center.

All Xbox digital codes are 25 characters long, include both numbers and letters, and are formatted in five blocks of five characters (xxxxx-xxxxx-xxxxx-xxxxx-xxxxx).

解决激活错误. 如果 Microsoft 365 无法激活，其最后会变为未授权，且 Microsoft 365 的所有编辑功能都会被禁用。 Microsoft 可能由于多种原因变为未授权。

Contact Microsoft Support. What's new. Surface Pro; Surface Laptop; Surface Laptop Studio 2

Treat all email as junk unless it comes from someone in my Safe Senders or Safe Recipients lists, or from senders in my organization Select this option if you want email messages from senders that aren't defined in your Safe Senders List or Safe Recipients List or email messages from outside your organization to be treated as junk email. Email messages identified as junk email are moved to the ...

To change notification settings for individual senders, under Get notifications from these senders, turn a notification sender either on or off—or select a sender's name and then turn on or turn off notification banners, lock screen privacy, turn notification sounds on or off, and set the priority of notifications.

Notes: You can either use an email address you own as a Microsoft account, or create a new address by choosing "Get a new email address" or "Use your email instead" when you sign up.

Create a group for your project or team. Create a PLC group in Outlook (Office 365 Education) A Professional Learning Community (PLC) group is a type of Microsoft 365 Group that provides a shared space for educators to use for collaboration.