I have several files on my iCloud drive and others in an external Mac drive. Both of these drives are mapped to Windows locations. I have SmartMount enabled. The drives show up in Windows Explorer and everything works well with one exception. After Windows starts, my mail program (Thunderbird) or other programs that use files on the shared drives cannot locate the files. If I check the shared drives using Windows explorer they look fine and all the files are visible. After this Explorer check Thunderbird and the other programs can find the files without error.