LUM Enable 20,000 users not working, only a some are enable

Hi,

Can anyone help with LUM enabling a large number of user in iManager

I am trying to LUM enable a group that has 24,000 user in my eDirectory but it only sees to be working for a few thousand of the users within the group.

Is there some limitation on the number of users you can simultaneously enable on an OES 11 SLES 11SP1 server?