To better assist you on this issue, kindly do share more details about your scenario. Since the question is posted on azure-communication-service
, I believe you're referring to steps outlined in the Azure docs Closed Captions overview or please share the Azure doc that you're referring to.
As mentioned in the doc -Azure Communication Services allows one to enable Closed Captions for the VoIP calls in private preview
. Closed Captions are supported in ACS to ACS calls on all platforms (Anroid, iOS, Web).