Good day! Test the dynamic DNS updates # samba_dnsupdate --verbose IPs: ['200.2.2.15'] Looking for DNS entry A dcs3.BEO.IMP 200.2.2.15 as dcs3.BEO.IMP. Looking for DNS entry CNAME 246933f5-768e-4399-9adb-251271d245e3._msdcs.BEO.IMP dcs3.BEO.IMP as 246933f5-768e-4399-9adb- 251271d245e3._msdcs.BEO.IMP. Looking for DNS entry NS BEO.IMP dcs3.BEO.IMP as BEO.IMP. Looking for DNS entry NS _msdcs.BEO.IMP dcs3.BEO.IMP as _msdcs.BEO.IMP. The DNS entry NS _msdcs.BEO.IMP dcs3.BEO.IMP, queried as _msdcs.BEO.IMP. does not exist need update: NS _msdcs.BEO.IMP dcs3.BEO.IMP ..... dns_tkey_gssnegotiate: TKEY is unacceptable Failed nsupdate: 1 Failed update of 1 entries I can't understand this message: The DNS entry NS _msdcs.BEO.IMP dcs3.BEO.IMP, queried as _msdcs.BEO.IMP. does not exist need update: NS _msdcs.BEO.IMP dcs3.BEO.IMP On the DC domain controller (Windows Server 2008 R2) there is an entry in DNS - *_msdcs.beo.imp* See attachment "dc-samba-dns002.jpg" What do I need to do to fix the problem?