About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

Here are the most likely causes for an unrecognized charge: A Microsoft subscription has recurring billing enabled. Someone you know, such as a family member, bought something with your card. You can now investigate this on the Manage your payments page. A previously declined charge was charged again. A pre-order or split order was shipped. Someone made an in-app purchase from an app, game, or ...

More help If you're using a work or school account and couldn't install classic Outlook following the steps above, contact the IT admin in your organization for assistance.

What are passkeys? Passkeys are a replacement for your password. With passkeys, you can sign into your Microsoft personal account or your work/school account using your face, fingerprint, or PIN. Signing in with a passkey is simple and fast and helps protect you against phishing attacks. Passkeys are supported on desktop and mobile browsers (mobile app support is coming soon). You can use ...

Microsoft Defender's web protection helps protect you against malicious sites that are being used for phishing or spreading malware. Available on Windows, Android, and iOS.

Interpreter in meetings Make meetings more inclusive with the Interpreter agent when participants don't share a common language. Interpreter is ideal for meetings where participants speak different languages and you’d traditionally rely on a human interpreter. Interpreter helps bridge communication gaps by translating speech into each participant's preferred language—allowing everyone to ...

Learn how to use Microsoft Translator in the Edge browser to translate webpages.

This article explains how to get your vCard (.vcf file) into CSV format so you can import your contacts into Outlook. IMPORTANT: Make sure you've exported all of your contacts from iCloud! The most common mistake we see customers make is they export only 1 contact from iCloud when they intended to export all of them. For instructions on exporting all of your contacts from iCloud, see Export ...

Describes how to use the Regsvr32 tool to register and unregister OLE controls. Also describes the error messages that may occur and what they mean.