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public.It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.

Whether it’s a new job title (congratulations!) or a phone number change, make sure you keep your email message signature up-to-date. If you're using new Outlook, for more information about email signatures, or if you haven’t created one yet, see Add a signature to messages.. Select File > Options > Mail > Signatures.

格式设置选项. 选择应用了格式设置的行或列时，该格式设置将被传输到插入的新行或列。 如果不希望应用格式设置，可以在插入后选择“插入选项”按钮，然后从以下选项中进行选择： 如果“插入选项”按钮不可见，请转到“剪切、复制和粘贴”组中的“文件”>”选项”>”高级”，选中“显示 ...

Add an interactive checklist. Checklist is a feature that allows you to insert an interactive list in Word for Web. You can check and uncheck the checklist and keep track of the tasks that you are performing.

Important: you should limit the number of administrators on your Windows device because administrators have complete control over the system.Administrators can change settings, install software, and access all files. If too many people have this level of access, it could lead to security risks like malware installation or unwanted changes to your system.

Dynamic lock is a security feature that automatically locks your device when you are not around. It uses Bluetooth to pair with a phone, and locks the device when the Bluetooth signal drops below a certain level, indicating that you are no longer near your device.

Wait for it to find nearby printers, then choose the one you want to use, and select Add device.If you want to remove the printer later, select it, and then select Remove.

See also. If you can't find Microsoft Store, see Trouble finding Microsoft Store in Windows 10. If you're having trouble launching Microsoft Store, see Microsoft Store doesn't launch. If you can launch the Microsoft Store but you are just having trouble finding or installing an app, see I can't find or install an app from Microsoft Store. Need more help?

For info on how to properly care for the power cord and power supply, see Clean and care for your Surface.. Safety and regulatory information. To view the safety and regulatory information for Surface and Surface power supplies, including shipping information and AC power cord safety, see Product safety warnings and instructions.. Where to find a power supply

Insert rows. To insert a single row: Right-click the whole row above which you want to insert the new row, and then select Insert Rows. To insert multiple rows: Select the same number of rows above which you want to add new ones.Right-click the selection, and then select Insert Rows.. Insert columns. To insert a single column: Right-click the whole column to the right of where you want to add ...