Users may receive the following error when opening an exported file in Microsoft Office 2010: Protected View Editing this file type is not allowed due to your policy settings. Click for more details. The user may not be able to save or modify the document. The error occurs when the file type being used is blocked in the File Block settings in the Trust Center in Microsoft Office.
Please see Microsoft Support Knowledgebase solution below:
Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist with implementing resolutions from these websites.