title: Set MicrosoftTeams notification on Prometheus Alertmanager
body: <p>I try to set Microsoft Teams notifications for Prometheus Alertmanager, but the notification doesn't arrive.</p>
  
  <p>The alertmanager.yaml file is:</p>
  
  <pre><code>global:
  resolve_timeout: 5m
    http_config: {}
    smtp_hello: localhost
    smtp_require_tls: true
    pagerduty_url: https://events.pagerduty.com/v2/enqueue
    hipchat_api_url: https://api.hipchat.com/
    opsgenie_api_url: https://api.opsgenie.com/
    wechat_api_url: https://qyapi.weixin.qq.com/cgi-bin/
    victorops_api_url: https://alert.victorops.com/integrations/generic/20131114/alert/
  route:
    receiver: teams
    group_by:
    - alertname
    routes:
    - receiver: teams
      match:
        alertname: QuotaCPUSolrExcedeed
  receivers:
  - name: teams
    webhook_configs:
    - send_resolved: true
      http_config: {}
      url: https://outlook.office.com/webhook/xxx
  templates: []
  </code></pre>
  
  <p>The rule 'QuotaCPUSolrExcedeed' exist and work on Prometheus.</p>
  
  <p>If I put the webhook_url on Grafana, the notification arrives, but if I use alertmanager, no!</p>
  
  <p>Do you have any idea what the problem might be?</p>