Hello @Koteswara Pentakota ,
Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
I understand that you would like to migrate your DNS name servers from BigRock to Azure. Currently your DNS delegation is between GoDaddy and BigRock but you would like to move it between GoDaddy and Azure DNS. Please correct me if my understanding is wrong.
Azure DNS allows you to host a DNS zone and manage the DNS records for a domain in Azure. In order for DNS queries for a domain to reach Azure DNS, the domain has to be delegated to Azure DNS from the parent domain. Keep in mind Azure DNS isn't the domain registrar.
Refer : https://learn.microsoft.com/en-us/azure/dns/dns-domain-delegation
If my understanding is correct, then you need to follow the below steps:
1) Obtain your existing DNS zone file from BigRock and then import that file into Azure DNS. Importing a zone file creates a new zone in Azure DNS if the zone doesn't already exist. If the zone exist, then the record sets in the zone file will be merged with the existing record sets.
Refer : https://learn.microsoft.com/en-us/azure/dns/dns-import-export#introduction-to-dns-zone-migration
2) Retrieve the name servers from your Azure DNS zone and update the parent domain in Go Daddy with the Azure DNS name servers.
NOTE : When you copy each name server address, make sure you copy the trailing period at the end of the address. The trailing period indicates the end of a fully qualified domain name. Some registrars append the period if the NS name doesn't have it at the end. To be compliant with the DNS RFC, include the trailing period.
Refer : https://learn.microsoft.com/en-us/azure/dns/dns-delegate-domain-azure-dns
3) Wait for the DNS propagation and verify the delegation.
Before you can successfully verify that the DNS delegation is working, you may need to wait at least 10 minutes after you complete the delegation. It can take a while for changes to propagate through the DNS system. So, yes you assumption is correct to wait for 24-48 hours.
Kindly let us know if the above helped or you need further assistance on this issue.
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.