Triage missing or delayed alerts: quiet hours, channels, spam, thresholds, maintenance mode, escalation policies, and acks.
Are your quiet hours active? Go to Settings → Notifications → Alert Preferences and check the quiet hours schedule. Non-critical alerts are suppressed during quiet hours — they still show in the Alerts Inbox marked suppressed with a scheduled-for time.
Verify your notification channels are configured:
outlook.office.com / webhook.office.com) still work but are being retired — see Teams Integration.LemWatch emails come from alerts@lemwatch.com. Check your spam folder and add this address to your contacts/allowlist.
If set to 2 or 3, you won't get alerts for single failed checks. Go to Settings → Notifications → Alert Preferences to check your threshold.
Is the site in maintenance mode? Alerts are suppressed during maintenance. Check the site's Settings tab.
You may have disabled certain alert types. Go to Settings → Notifications and check which event types are enabled.
If the site is attached to an escalation policy and somebody already clicked Acknowledge on the incident, the remaining escalation steps stop firing on purpose. Reopen the incident or remove the ack to resume escalation. See Acknowledging incidents.
A per-site policy only fires when it's selected on the site. Open Edit Site → Notifications → Escalation policy and confirm one is chosen.