GPO not applying mapped drives for some users

GPRESULT /Z reports that the 'Office Drive Map' Group Policy has been successfully applied on our Terminal server. However, for a handful of users they are receiving no mapped drives.
GPUPDATE /FORCE yields no result; rebooting the Terminal server proves unsuccessful too.
I have 3 other group policies that are being successfully applied across the board so I've been stumped with this one for the past couple of weeks.
Any thoughts, suggestions - fire away!

Many thanks
Simon FanningIT Network ManagerAsked:
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enable group policy loop back processing with replace mode in GPO attached to terminal server servicing map drives and check

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Simon FanningIT Network ManagerAuthor Commented:
It would appear that this setting plus a couple of forced GPUPDATES did the trick... I've been battling this for quite a time.. thanks so very much!!
Loop back processing ensure that no matter who logged on to computer / server, policy will apply
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Windows Server 2008

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