Disabling Protected View to Edit Excel Files
These steps are for Excel 2010, 2013, 2016, and for Excel in Microsoft Office 365.
To disable Protected View in Excel:
- Go to File > Options.
- Select Trust Center > Trust Center Settings > Protected View.
- Clear the box for Enable Protected View for files originating from the internet.
- If this is an email attachment, clear the box for Enable Protected View for Outlook attachments