hi Armin7734
I figured it out.
Microsoft did something really stupid.
You also have to add you iTunes folder to your to groove.
So not you folder where your music is saved.
I only had My music folder added to Groove. (D\music\mp3)
When you search for iTunes playlist, Groove wil only search for the files in the folder you added to Groove,
But Itunes Always saves the playlist files to (C:\Users\username\My Music\iTunes\)
So add your iTunes folder to Groove and it will work : (C:\Users\username\My Music\iTunes\)
Microsoft are *** kiding me you didn't set this folder as default search folder for playlist,s.... you do Know it is not changeable.
Armin7734 thx for the responce.