Domain controller file share

Hi Everyone,

Scenario is we have a Domain controller which has configured with scheduled backup,

We configured backup destination to local drive in same disk,

Now I've a powershell  script to copy that backup from local drive to file share location in ADC(Additional DC)

i Don't want to run powershell script in DC So i took one more VM to perform copy job,

Now i'm not able to access the backup folder in DC 

i'm getting denied Notification,Since i've given full permission for Share!!

please suggest me the right way to get access