Are you using Confluence Cloud or Server?
Excellent point. This is only available for Confluence Server and JIRA Server.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
I have no idea. How can I tell? Most likely it might be Confluence Cloud.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
If your Confluence URL is https://something.atlassian.net then you are using Cloud which unfortunately means no HTML macro.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Milo is correct, please see:
https://confluence.atlassian.com/display/ConfCloud/Restricted+functions+in+Confluence+Cloud
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
Perhaps consider opening a support issue?
image2016-3-17 16:19:35.png
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.