Avaya OneCloud CPaaS must be configured so that Avaya OneCloud CPaaS can deliver incoming SMS to Presence Services.

If extended hostname validation is enabled, ensure that zang.io and pubsub.zang.io are resolvable through the DNS. Presence Services validates the certificate provided by Avaya OneCloud CPaaS Services. Failing, hostname validation impacts any outgoing communications with Avaya OneCloud CPaaS.