How to change default save location in Acrobat Reader DC

Hello,

we´re using Adobe Acrobat Reader DC with Citrix VDA. Because of necessary Security-Options we have restricted the C:\ Path so the Users are unable to save on C:\. If the User try to save a File in Acrobat Reader DC opened up from Outlook the File wants to be saved in "C:\Users\User\Appdata\local\..." and a Error appears.

Thats why I have to change the default Path of save location to our Network-Drive. But I cant find any way how to do. Is there a Reg-Key that can be set or something else?

Regards

Michael