Copy this setup URL into your Quickly inbox (Beacon) field:
https://track.cloudinspire-mail.com/?token=Zz_LAW8dgCDqGNafNEvcOt6EPkrs9-NNvsRxbzK3-bI
Also shown in server logs on first start. After connecting from Quickly, this page is replaced by a minimal response and the token is no longer shown here.