LDAP issues

I am using Openfire 3.6.4 and have setup a test of 3.7 both experience the same issue. I am using LDAP and not all of the users show up in thier groups in the OpenFire console therefore, when a user logs into SPARK they do not see other users in their group. If I connect to a 2003 server for ldap everyone in the group is displayed, when I change to a 2008R2 ldap server some users show up and others do not. Has anyone else experienced this issue and if so, have you found a resolution? I will be demoting my 2003 domain controllers soon and need to resove this issue ASAP. Thank you!