People outside of my organization cannot connect

Hi @Heike1 

Is your school account requiring authentication to join the meetings? It could be that an authentication profile has been set up so that only participants logged-in to a school account are allowed in the meetings, while "external users" (users not on the school account) are not allowed in. 

I would check the Security settings when scheduling a meeting. If the Require authentication to join is enabled, check to see which profile is being used. If there are others available, you may need to switch to a different authentication profile to allow the external participants to join. 

You can learn more about authentication profiles, and how to create exceptions for specific users, in this support article: https://support.zoom.us/hc/en-us/articles/360037117472-Configuring-authentication-settings-and-profiles

Hope that helps and please make sure to mark the solution as accepted if this information is what you needed.

Sign in to the Zoom web portal. In the navigation panel, click Settings. Click the Meeting tab. Under Security, verify that Approve or block entry for users from specific countries/regions is enabled. If the setting is disabled, click the toggle to enable it. If a verification dialog displays, click Turn On to verify the change.

Hope this helps,
John