Can I customise the join URL (event URL)?

You can create and customise your own join URL for your Brella event by navigating to the Admin Panel, and then Details.

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Main part that will be entered from your side would be the Join Code, which then would be replicated to join URL.

Note: Do not change the Join Code after you will launch the event, as the majority of your attendees will not be able to get an access to your event anymore.