Deploy RTC Widgets as HTMl in External website
One answer
RTC Widgets usually contain protected resources, which means you can view their contents only when you have logged on to RTC. If the "external HTML page" that you mentioned is static HTML page, I don't really think it will ever work. If it is a dynamic page, you should probably make it as a "friend" to RTC. You also need to take "cross site scripting" into account, in which case contents get blocked if not configured correctly.