Query KMS record on DNS server
You need to configure the KMS host (Server)so that it has the credentials needed to create and update SRV, A, and AAAA resource records on your DDNS servers, or you need to manually create these records. The recommended solution for giving the KMS host the needed credentials is to create a security group in Active Directory® and add all KMS hosts to that group. In the Microsoft DNS server, ensure that this security group is given full control permission over the _VLMCS._TCP record on each DNS domain that will contain the KMS SRV records. This is the nslookup command to check if the correct record is in the DNS Server : nslookup -q = SRV _VLMCS . _TCP