In the new Teams, you can switch between apps, respond to chat messages, and join meetings and calls more quickly while using less battery and memory.

Learn how to retrieve a forgotten username or password for your Office for home or Office for business account.

Change two-step verification settings; Common problems with two-step verification for work or school accounts; Manage app passwords for two-step verification

Get answers to common questions about the Xbox Game Pass Ultimate subscription.

最新の Windows 更新プログラムを入手して、デバイスの円滑かつ安全な動作を維持する方法について説明します。

If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

An array formula (one that spans multiple cells) can do calculations on rows and columns of cells where you might otherwise need to use several formulas. For example, you can count the number of characters that are contained in a range of cells, sum only numbers that meet certain conditions (such as the lowest values in a range or numbers that fall between an upper and lower boundary), and sum ...

Use Find my device to locate and lock your lost or stolen Windows devices.

Help to fix install errors for Office, such as "can’t install Office", "something went wrong" or situations where install hangs or activation fails.

Microsoft Teams をダウンロードする方法について説明します。 Microsoft 365 で Microsoft Teams を入手するか、無料バージョンの Teams をダウンロードしてください。