We've had some users who are able to properly preview emails in X1, but are not able to perform any post-search actions (i.e. Open, Reply, Forward, etc.). When performing a post-search action, the following message is displayed:
We believe that this occurs for users who have installed and then uninstalled Outlook/Office 2007 (Office 12).
It's probable that you have a couple of rogue registry entries that are the cause of the problem. The keys are:
1. Close Outlook and X1 using File > Exit (verify that the X1.exe process is stopped via Task Manager)
2. Download this file: http://www.x1.com/cs/Outlook07.zip
3. Extract the downloaded zip file
3. Double-click the extracted Outlook07.bat file to run (this will make a backup copy of the registry entries, just in case, and will then remove the entries)
4. Restart your computer
After your computer restarts, launch Outlook and then X1 to see if you can now see your folder selection list.