Fresh install on ubuntu storage is a cifs share to Freenas. Windows client won't backup

Yesterday I made a fresh install on ubuntu. That instance of freenas has a share mounted from freenas. One laptop won’t backup. I get the following error:

Creating symlink at “/mnt/UR_Backup/Windows_Backups/Lisa-LaptopJ2J1830/200816-0719/C/Documents and Settings” to “C\Users” failed. Operation not supported (errorcode=95)

When I ran urbackup inside a freenas jail I didn’t have any issues. Can someone help me get this going?