We use Dropbox as a file server for small 4 user company spready across the US. We have run into an issue where PDF's uploaded by one user are not visible by other users. We waited over the weekend and other users are still not able to see the file. The status icon displays as synced. The file name is "25-05-28_2070 Google Blk 38 Phase II DD Drawings". Is there any advise on troubleshooting this?