When a user runs an Office app, such as Word or Excel, diagnostic information is collected and saved to log files on the user’s device. These log files contain information about the processes and components running in the application, and can help detect, diagnose, and fix issues and help make improvements to Office.

Reputation-based protection. Reputation-based protection leverages what Microsoft knows about various sites, services, and publishers, as well as threats we've seen in action to help protect you from malicious or potentially unwanted apps, files, or websites.

Select the Review tab, and then select Unprotect Sheet.If the Unprotect Sheet button is unavailable, turn off the Shared Workbook feature first.. If you don't want the formulas hidden when the sheet is protected in the future, right-click the cells, and select Format Cells.On the Protection tab, clear the Hidden check box.

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The Office Document Cache contains the files Office uses to make sure your changes are saved in the cloud. Sometimes when you use Office with other apps in the cloud, the apps fail to sync properly before you close Office and this can damage, or corrupt, your Office Document Cache.

Microsoft To Do is a simple and intelligent to-do list that helps you manage all your tasks in one place. With To Do's integration with Outlook, you can use My Day to see your upcoming calendar events and tasks anywhere in Outlook, including Mail, Calendar, and People.

Function name. Type and description. ABS function. Math and trigonometry: Returns the absolute value of a number ACCRINT function. Financial: Returns the accrued interest for a security that pays periodic interest ACCRINTM function. Financial: Returns the accrued interest for a security that pays interest at maturity ACOS function. Math and trigonometry: Returns the arccosine of a number

This article applies to Office Home & Business, Office Professional, and individually purchased Office apps. To switch an Office install to or from Microsoft 365, see Switch your Office license.. Change the product key for your version

Try sending email from another app or device: If you have another email app or another computer or mobile device, try sending and receiving email from that app or device. If you can't, there might be an issue with your email server. Contact your email provider for support.

Learn how to locate, install, and share files with custom fonts compatible with Microsoft Office applications.