CSV file format for import


I am using Powershell to create a csv file to use for input with Migration manager for AD. However, when I attempt import the powershell created csv I either get a message saying the file is in an invalid format or nothing happens.

I noticed when I export from a collection, the file encoding is Unicode, have tried adjusting my exported file format to use the same encoding with no luck. I am also exporting specifying the tab delimiter. 

If I paste the data I extract from my file into the Quest created export file, and make no changes just save, the import into the new collection works fine.

Any ideas?