Create MailBox(MB) record using dnscmd

To add a MB record through command prompt, do the following

1. Assume the domain for which mailbox need to be created is "myrootdns.com", and host which will host the mailbox is "dnsserver.myrootdns.com".
2. Now run the below command to create MB record.
dnscmd dnsserver /recordadd myrootdns.com dnsserver /Aging /OpenAcl MB dnsserver.myrootdns.com