Learn how to activate Windows using an internet connection, automated system, or live support advocate.

If you have multiple accounts in Outlook, when you compose a new email message, Outlook picks the default account as the From account.However, if you want to Reply, Reply All, or Forward a message, Outlook will send your message with the same account the original mail was sent to.For example, Cheryl has two accounts.

Microsoft サポートにお問い合わせください。一般的な問題の解決策を見つけるか、サポートエージェントからサポートを受け ...

This article is for setting up your email account only! If you're having trouble using the Outlook for iOS app, please visit our FAQs for more self-help information.. If you have a work or school account that uses Microsoft 365 for business or Exchange-based accounts, there may be additional requirements set by your IT admin.

countif 関数 (統計関数の 1 つ) は、1 つの検索条件に一致するセルの個数を返します。たとえば、特定の市が顧客リストに表示される回数を返します。 最も単純な形式では、countif は次のように指定します。

Do you ever import or enter data in Excel that contains leading zeros, like 00123, or large numbers like 1234 5678 9087 6543? Examples of these are social security numbers, phone numbers, credit card numbers, product codes, account numbers, or postal codes.

Learn how to share files in File Explorer on Windows 11 or Windows 10 using OneDrive, email, or nearby device.

Learn how to open, navigate, and troubleshoot File Explorer in Windows, with answers to common questions and support assistance.

How do I get started with Skype? Select your device and start the download. Note : Skype for Windows 10 and 11 (version 15) is already installed on the latest version of Windows 10 and Windows 11.

Get help with signing in, changing passwords, creating and sending mail, deleting mail, creating folders, and more in Outlook on the web.