By default, all iframe hosts are allowed to be embedded into Slab. However, admins have the option to allow only specific hosts or disable all of them.
This article is about the admin setting. To learn more about how to embed an iframe, click here.
Changing your iframe host setting
Click your team name in the top-left corner of the sidebar.
Click Team settings in the dropdown menu.
Click Security in the left sidebar.
Under Permissions, click Edit next to Allowed iframe hosts.
Select one of the options.