Give manage permission to non-admin team members from role settings (Settings > Access Permission > Roles). Admin users will always get access.

Give access permission to clients from client permissions settings (Settings > Client portal > Client permissions). Enabling this, you can share meetings with them.

Then the permitted users will get a new menu item in the left menu. Labeled as JAAS meetings.

Please note that, if the user's left menu or default left menu is already edited, then the JAAS meetings won't be shown by default. Then you can add the menu manually from the left menu settings.

Enable notifications from Settings > App Settings > Notification Settings.

Manage email notification templates from Settings > App Settings > Email templates.