At the page, try to pick the right slack team you want to integrate with.
Select a channel that you want all the message to post to. Normally you can pick ‘ #general’. In this case, any incident message posting will have a copy at the #general channel so that the participants there will know a new channel has been created for what kind of incidents.
Go back to Everbridge portal, you will see that the integration has been set up.
In the ITA dashboard, the ‘channel’ column will show up.
The message will either show up in an existing Slack channel or a new channel created by the previous action.