Select Review activity to check for any unusual sign-in attempts on the Recent activity page.If you see account activity that you're sure wasn't yours, let us know and we can help secure your account—if it's in the Unusual activity section, you can expand the activity and select This wasn't me.If it's in the Recent activity section, you can expand the activity and select Secure your account.

Note: This topic is for Microsoft 365 for business.If you have an Office for home product and you're looking for where to install Microsoft 365, see Install or reinstall Office on a PC or Mac.To see what Office for home products you have a license for, sign in with your Microsoft account to Services & subscriptions.

Notes: The site usage report download does not include data for Shared with external users in the report.. The site usage report download does not include data for average time spent per user.. To export a Shared with external users report, you need to extract this data to a CSV file by clicking the Run Report button on the bottom right corner of the page.

In Windows 10, action center is where you'll find your app notifications and quick actions—which give you quick access to commonly used settings and apps.

If you're having trouble using the Outlook for Android mobile app, Open an in-app Outlook support ticket. 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.

Argument name. Description. Sum_range (required). The range of cells to sum. Criteria_range1 (required). The range that is tested using Criteria1.. Criteria_range1 and Criteria1 set up a search pair whereby a range is searched for specific criteria. Once items in the range are found, their corresponding values in Sum_range are added.. Criteria1 (required)

加载项为 Microsoft Excel 提供可选的命令和功能。 默认情况下，加载项在 Excel 中不立即可用，因此在某些情况下，必须首先安装和 激活这些加载项，以便您可以使用它们。 某些加载项内置于 Excel 中，例如规划求解和分析工具库。 其他一些加载项可从下载中心获取，必须先下载并安装。

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public.It issues digital certificates, signs certificates to verify their validity and tracks which certificates have been revoked or have expired.

The following are some ways you can work with lists to help you to manage information for your group. Track versions and detailed history Track versions of list items, so that you can see which items have changed from version to version, as well as who changed the list items.If mistakes are made in a newer version, you can restore a previous version of an item.

After you turn on two-step verification or set up the Authenticator app, you may run into issues if you use older devices (like Xbox 360 or a mail-sending security camera) that don't support two-step verification. For those devices, you can sign in with an app password instead. An app password is a long, randomly generated password that you provide only once instead of your regular password ...