Hi All, We have a client running an EPiServer Enterprise 4.61 site. They are using LDAP to synchronise their active directory into EPiServer. The synchronisation works OK most of the time, but occasionally they receive this error, Deleting LDAP Users: All Users = 2043 LDAP Users = 1724 LDAP Users deleted = 1724 Performing LDAP Synchronisation: Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.Error adding new user.E Any ideas? At the moment I have not included the LDAP setup details which are in the web config, I will add that in when I have it available.