If Excel keeps blocking files from being inserted, chances are the file is blocked by Trust Center, or maybe the workbook or locked. Here's the fix!

Now, select File Block Settings from the left side. On the right side, select the Open checkboxes for the file types that you want to open in the Protected View.

On its Settings screen, the File Block Settings tab contains a long list of file types, most with dual check boxes that set limits on opening and saving individual formats.

Microsoft will soon be blocking external links to blocked file types in Excel. This is part of a broader effort to reduce or disable exploits that have previously been used to infect users with ...

Though Microsoft has backed off earlier plans to block unsafe macros in Excel documents, that change is still coming. Here's what to do now to stay secure.

Why Can't I Insert a File in Microsoft Excel?. Along with the formulas, functions, calculations and data you enter into a Microsoft Excel worksheet, the program also accepts files from other ...

Microsoft has silently added new group policies to allow Office 365 admins to block Excel users from opening untrusted Microsoft Query files with IQY, OQY, DQY, and RQY extensions.