Folder Redirection 502 Access Denied but redirecting to wrong place

hi,

i have come across unusual problem.  folder redirection implemented few months ago number of folders redirected following settings:

• redirect everyones folder same location
• create folder each user under root path
• \\server\homefolders

it has worked flawlessly in recent weeks when create new users, of them experience problem.  folder redirection fails consistently user 502 access denied.  isn't unusual bit.  unusual bit - message is:

failed apply policy , redirect folder "documents" "\\fileserver\homefolders\joe.bloggs\documents".

redirection options=0x1001.

the following error occurred: "failed build list of regular subdirectories under "\\fileserver\homefolders\jane.doe\documents".".

error details: "access denied.

".

yes reason knows should redirecting to, attempts redirect elses home folder location.  i've substituted server name , user names security name equivalent jane.doe consistent in every error.

this occurs on our rds 2012 r2 farm, has 3 session hosts and doesn't happen on other system.  use roaming profiles.  have logged user off , deleted local , network profiles same result.  i've rebuilt gpo handles folder redirection, again, same result.  i've checked , double checked folder redirection settings , nothing points specific jane.doe user.

anyone come across before?

rebuilding hosts scratch implemented work around.  never got bottom of causing behaviour.

Windows Server  >  Group Policy