I want to revoke trust from a document/documents that I've previously trusted to not open in Protected View I want to change my Protected View settings How do I exit Protected View so that I can edit, save, or print? Why is my file opening in Protected View? However, the 'mark of the web' (ie right-click the file, Properties > General and tick 'Unblock') had been removed long ago.Note: If your machine has Application Guard for Microsoft 365 enabled, documents that previously opened in Protected View will now open in Application Guard for Microsoft 365. I wonder if MS has found another way to try and stop macro-enabled files (that have been downloaded / emailed) from running?!Īs an aside, the offending AddIn had been downloaded over the internet.

However, the 'mark of the web' (ie right-click the file, Properties > General and tick 'Unblock') had been removed long ago. But I know this isn't gonna be the case for every AddIn for everyone.Īs an aside, the offending AddIn had been downloaded over the internet. If you can identify a specific AddIn (or I guess could be multiple AddIns) and opt not to automatically load it/them when Excel starts then I think this is likely to be a better solution than disabling Protected View (no security risk). In my case, I wasn't really using the offending AddIn so I have left it that it does not load automatically when Excel starts and so I now do not get the message.

I went through the list of AddIns (in Excel 365, see: File > Options > Add-ins > Manage > Excel Add-ins > Go) and unticked/unchecked each one individually to find the offending AddIn. In my case, the offending file that causes the message to appear when Excel starts is an AddIn that is being automatically loaded when Excel starts. The problem may be related to an update from Microsoft as it is being reported by users on other sites.

Excel opening in protected view