Problem is resolved.  Problem was in NETBIOS name. If I send request to NEW interface, server return NETBIOS as OLD name = OLD interface. After change NETBIOS name, all is all right.  Thank you, Jirka.
Hi, do you help me with my problem ...  I have CIFS with one eth. interface. That I went and added another (different IP address). Since then, does not manage users through the MMC.  When you add back the original, everything works.  VNX5500 - file, FW: 7.1.76-4, 05.32.000.5.215  Thank you for your advice. Jirka.
Manage CIFS users after change interface