By default, all iframe hosts are allowed to be embedded into Slab. However, admins can toggle this setting in their Team Settings if they prefer only to allow specific iframe hosts or disable all iframe hosts. Learn more about how to embed an iframe here.
Note: This feature is only available on Business and Enterprise plans.
Changing your iframe setting
To change your iframe settings:
Click your team name in the top top-left corner of the sidebar
Click Team Settings in the dropdown menu
Scroll down to the Permissions section
Next to Allowed iframe hosts, press the Edit button
Choose one of the options