مشكل در snapshot

با سلام

از اكتيو دايركتوري snapshot گرفتم و براي ديدن محتواي ntds ميخوام پورت ان را عوض كنم..اما در مرحله اخر ارور ميدهد :

Active Directory Domain Services has detected that the quota-tracking table is either missing or not completely built. The table will be rebuilt in the background (resuming the progress of any previous rebuild, if possible). Until it has completed, quota enforcement will not be in effect.

علت اين مشكل چيست و چگونه حل مي شود؟