How to get rid of external URL warnings in dashboards?

[danunz1]

(Running v9.0.2208 of Splunk Cloud)

When I load a dashboard with external URLs in they throw up an external content warning - how do I get rid of these?

In the version we're running, I cannot update 'Settings > Server settings > Dashboards Trusted Domains List' as I believe that is only available in v9.0.2209. I'm also unable to enable automatic UI updates which is the fix in the current version. I've tried to create a web-features.conf but not having any luck. Thanks!

[danunz1]

this is my web-features.conf - I've also updated app.conf with a [triggers] stanza to manage web-features restarts

[settings]

# Allowing hyperlinks to load from trusted domains in Dashboard Studio
[features:dashboards_csp]
dashboards_trusted_domain.everything=*teams.microsoft.com