I am working on a time sensitive project and have run into a snag. I have MS Office 2016 for Mac installed on my Mac (not using a Windows partition) Anyhow, I'm working on a spreadsheet and have inserted several hyperlinks to pdf files that I have stored on my computer. I created a new file to store the links and linked the files to the spreadsheet from that new file. I intend for this new spreadsheet to evolve into a comprehensive database that contains a great deal of information, along with several links. I created the s-sheet and attached some linked files as described - worked beautifully. Then I ran into a snag - when I close and reopen the spreadsheet, I click on the pdf link and a dialogue comes up stating that I must locate the file by pointing to it again "for security purposes". This is not only tedious but, obviously an issue going forward b/c the step negates the nicety of linking files. First, I'm hoping someone can offer guidance in order to correct the issue locally (my computer/my own use). Second, once this is hopefully resolved, I need to be able to send the entire file to a colleague and I will want the same functionality on their end. (i.e.; open linked pdf's w/out additional steps) Any help would be greatly appreciated! Here is a screen shot of the dialogue that I receive once I've closed the spreadsheet, re-open, and click on a link in the s-sheet.