After installing ProjectWise Explorer with iDesktop Integration support for Microsoft Office, in order to use integrated Word or Excel, you will need to add Bentley Systems to Microsoft Office's Trusted Publishers list by opening integrated Word or Excel, and then when prompted, selecting to trust all content from this publisher (Bentley Systems). You only need to do this once. For example, if you add Bentley Systems to the Trusted Publishers list through integrated Word, then the next time you open integrated Word or Excel, you will not be prompted about it again. See your Microsoft Office documentation for more information about trusted publishers.