Tessera is a hosted ticketing platform that allows you to use a subdomain of your domain name.

Add the following records to your DNS:

TXT asuid.tickets.  :  "A33C7CC2E0CDB230938EDDA26F693DD4A575CBF8C98222BF495FC88379A5E39A"
CNAME tickets.  :  "tessera.azurewebsites.net"

The TXT record will allow Tecture to verify your domain name.

The CNAME subdomain will point tickets.mydomain.com to Tessera.