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Windows セキュリティによる保護を利用します - Microsoft サポート
Windows 10 と Windows 11には、最新のウイルス対策の保護を提供する Windows セキュリティが含まれています。 お使いのデバイスは、Windows を起動した瞬間からアクティブに保護されます。
Add or invite people outside your org to a chat in Microsoft Teams
With External Access for Teams, you can add or invite anyone outside of your Teams org who uses Teams, Teams for personal use, Skype (for consumers), and Skype for Business to a one-to-one chat.
Applies To: Microsoft Teams
Set up a security key as your verification method
What is a security key? We currently support several designs and providers of security keys using the Fast Identity Online (FIDO2) passwordless authentication protocols. These keys allow you to sign in to your work or school account to access your organization's cloud-based resources when on a supported device and web browser.
Check your Microsoft warranty and create service orders
Locate the device that you want to check the warranty on, then select Info & support.
Use inbox rules in Outlook.com or Outlook on the web
Every rule needs at least three things: A name, a condition, and an action. Rules can also contain exceptions to conditions. You can add multiple conditions, actions, and exceptions at each step by choosing Add a condition, Add an action, and Add an exception.. If you don't want any more rules to run after this one does, select the Stop processing more rules check box.
Applies To: Outlook on the web, Outlook.com
Microsoft account security info & verification codes
Important: You don't need to remove old security information unless there is an account security risk (e.g. someone else has access to your old mailbox).
Applies To: Microsoft account dashboard
How to investigate a billing charge from Microsoft
Tip: If you believe someone has acquired your payment info, contact your bank or your payment provider to prevent more charges. Tell them your credit card has been stolen or compromised - If you only dispute the charges, there's nothing to prevent the fraudulent charges from happening again.
Applies To: Microsoft account dashboard
Hardware warranty, services, and repair
Review the warranty terms, check your warranty status, and learn about the protection plans for your Microsoft device or accessory.
The text of my email messages is larger or smaller than usual
Change the display size of messages. When you compose, reply to, or forward an email message, and the message body (including the text) appears larger or smaller than the size that you typically see, you might have changed the zoom view setting.
Applies To: Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
Signing in with a passkey - Microsoft Support
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.
Applies To: Microsoft account dashboard