With cloud-registered video devices, there is an established chain of trust and we know whether those devices belong to your organization or not. To be able to achieve the same level of security with standards-based SIP video devices, complete the steps below. These will ensure that only your own organization’s SIP video devices can join meetings without the need for PINs and keys.
To complete the domain verification process, from the customer view in https://admin.webex.com, go to Settings and under Domains click Add Domain.
Enter your domain name and click Add.
For more information, see Add, Verify, and Claim Domains.
Click more beside your domain and choose Retrieve verification token.
Copy the verification token into your DNS TXT record.
Click Verify next to each domain.