This article explains how to set folder redirection using "Group policy Management".

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Instructions

1. Start "Group policy Management" as shown in the following screenshot:
   

2. Edit target OU's GPO as shown in the following screenshot:
   

3. For example,  set "desktop" folder redirection. Refer to the following screenshot, right click and choose "Properties".
   

4. Then "Target",set "setting" ,"Security Group Membership" ,"Target Folder Location"
   "root path " as shown.

Tips:

DORIS\casetest 
This is the "Group" name you created.
Root Path:
You must specify a network location which user has the permission to full access.
And you also need to add "%USERNAME%" to your " network path" as 
\\DORISDC01\test\%USERNAME%---> \\DORISDC01\test is the network path.
If you do not add "%USERNAME%" ,user will fail to create profile under the network path with 
event id:502( 0x80001219)

https://technet.microsoft.com/en-us/library/jj649078(v=ws.11).aspx