When trying to provision an AD group having 50 000 members, the standard process ADS_ADSGroup_Update systematically fails in FROZEN state with this "ErrorMessage" :
 The data of member property (vrtMembersSID@ADSGroup) was not transferred. Possible reasons are configuration issues or an invalid object state (Grp-WW-Internal-MobilityUsers).
More weird : despite the fact it fails, the process always add exactly 1024 members to the group. For instance, if DPRMemberShipAction contains 2000 lines related to this group, 1024 are managed and the remaining lines are removed.
Any idea ?