LDAP returns incorrect IP address

[Teimuraz]

I'm controlling list of attached users via LDAP and I've founded, that sometimes it gives no IP or just incorrect IP addresses for some users. It happened on NW 6.0, it's still happening on NW 6.5 SP7. I'm not sure it ut happened on 5.0, but I think yes.

At the same time NW itself (in Remote Manager) or third party programs like AdRem Server Manger shows everything correctly.

There's no rule and I can't find any legitimacy for it. For some users it's happening frequently or regularly, and for some of them it never happened...

Can anybody tell possible solution on this?

Thank you beforehand.