When you try to open a Excel workbook, PowerPoint presentation, or Word document on your mobile device, you might receive a message stating that the file is locked for editing by …

Find out how you can unlock an Excel spreadsheet when you are locked out of an Excel file by yourself or by another user.

To enable some cell editing, while leaving other cells locked, it's possible to unlock all the cells. You can lock only specific cells and ranges before you protect the worksheet and, optionally, …

You can open an Excel workbook and collaborate with others at the same time using co-authoring. This article will explain how.

You can lock a file to make it read-only and prevent it from being accidentally deleted. Lock or unlock a workbook to make it read-only Note: If your workbook is shared, anyone who has …

You cannot open a workbook or document that has been password protected in the Windows-based version of Excel or Word if the password is longer than fifteen characters. If you want to …

Worksheet protection is a two-step process: the first step is to unlock cells that others can edit, and then you can protect the worksheet with or without a password.

Learn how to use the new simplified sharing feature in Excel. Now it's easier to share your spreadsheet with others on SharePoint, OneDrive, or OneDrive for Business.

On the File menu, click Exit Task Manager. Start Windows Explorer, and then browse to the folder that contains the document file that you tried to open when you received the error message.

You can't make changes in a document, workbook, or presentation you open from a shared location if someone else is already working on the file in their desktop version of Office. You …