Is there a particular location (folder structure) that I should save my certificates (.cer files)? Here's my story/background: I successfully added my work email account through the built in Exchange ActiveSync, but have had problems since day one. It seems that every time it goes to sync (auto or manual), I get an error message: Security warning There are problems with the security certificate for this site. This certificate is not from a trusted authority Continue | View | Cancel View lets me see the specs on the certificate, but neither Continue or Cancel provides a consistant result. Most of the time I have to select combos of both and eventually it MAY sync. I have very little understanding of how Exchange works, but what I suspect is happening is that the phone is losing the certificate each time it goes to sync. Eventually (with manual finessing) the timing works out so that it assigns the correct cert. I've contacted both Verizon & my companies IT department. As I suspected, Verizon is attributing it to my companies security. I had no issues whatsoever with my Moto Droid, so I suspect that I I am having issues because of Sence. That's really the only main difference I can think of. My IT department has ordered an Incredible for them to troubleshoot on, but of course Verizon is back ordered right now, so who knows how long that will take, plus their troubleshooting. In the mean time, my IT department has provided me with 3 certificates to try (.cer files). Their instructions were to download the files and install them from a file manager (like Astro). When I select the files, the problem is that the phone gives me an error message stating that it does not support the file type. I've also noticed in Settings->Applications->Manage applications, there is a program caller "Certificate Installer" (version 7) with a 0.00 file size & all options (Force stop, etc.) are grayed out. I have no idea whether or not this is needed or used with Exchange. . . . . back to my question, is there a particular location (folder structure) that I should save the certificates (.cer files) that they sent me? Any help is greatly appreciated!