Does Kestrel install 3CX updates immediately?

Check for updates does not install. Apply queues a full backup, then InstallUpdates. You can schedule a start time.

Will on-call get a down alert during an update?

Open a 30 or 60 minute maintenance window first. Down alerts are suppressed until it ends.

3CX updates and backups for MSP fleets

Partners patch fleets, not one box. Kestrel checks production (sp150) updates, takes a full backup, then installs — and can keep down alerts quiet while the host restarts.

The job

Find who is behind. Backup. Install. Confirm version. Do not page the on-call tech because you rebooted them on purpose.

What Kestrel does

Per-host update check from Maintenance or Manage.
Apply now or schedule. Backup first (full contents), then install. The PBX restarts.
Last-backup time on the PBX detail KPI strip. Backup-stale alerts if nothing ran in 24 hours.
Update-available alerts when a production update is waiting.
Export a console-restriction blacklist so new hosts can allowlist Kestrel egress.

Maintenance use case · Security