diff --git a/ansible/group_vars/all.yml b/ansible/group_vars/all.yml
index 1b4a311c7c..b9f5017ad2 100644
--- a/ansible/group_vars/all.yml
+++ b/ansible/group_vars/all.yml
@@ -578,9 +578,6 @@ prometheus_alertmanager_cluster_port: "9094"
 prometheus_alertmanager_public_port: "{{ haproxy_single_external_frontend_public_port if haproxy_single_external_frontend | bool else prometheus_alertmanager_port }}"
 prometheus_alertmanager_listen_port: "{{ prometheus_alertmanager_port }}"
 
-# Prometheus MSTeams port
-prometheus_msteams_port: "9095"
-
 # Prometheus openstack-exporter ports
 prometheus_openstack_exporter_port: "9198"
 prometheus_elasticsearch_exporter_port: "9108"
@@ -1225,7 +1222,6 @@ enable_prometheus_blackbox_exporter: "{{ enable_prometheus | bool }}"
 enable_prometheus_rabbitmq_exporter: "{{ enable_prometheus | bool and enable_rabbitmq | bool }}"
 enable_prometheus_libvirt_exporter: "{{ enable_prometheus | bool and enable_nova | bool and nova_compute_virt_type in ['kvm', 'qemu'] }}"
 enable_prometheus_etcd_integration: "{{ enable_prometheus | bool and enable_etcd | bool }}"
-enable_prometheus_msteams: "no"
 
 prometheus_alertmanager_user: "admin"
 prometheus_ceph_exporter_interval: "{{ prometheus_scrape_interval }}"
@@ -1240,7 +1236,6 @@ prometheus_ceph_mgr_exporter_endpoints: []
 prometheus_openstack_exporter_endpoint_type: "internal"
 prometheus_openstack_exporter_compute_api_version: "latest"
 prometheus_libvirt_exporter_interval: "60s"
-prometheus_msteams_webhook_url:
 
 prometheus_public_endpoint: "{{ prometheus_external_fqdn | kolla_url(public_protocol, prometheus_public_port) }}"
 prometheus_internal_endpoint: "{{ prometheus_internal_fqdn | kolla_url(internal_protocol, prometheus_port) }}"
diff --git a/ansible/inventory/all-in-one b/ansible/inventory/all-in-one
index 77514bfe8b..8d5c22344a 100644
--- a/ansible/inventory/all-in-one
+++ b/ansible/inventory/all-in-one
@@ -555,9 +555,6 @@ monitoring
 [prometheus-libvirt-exporter:children]
 compute
 
-[prometheus-msteams:children]
-prometheus-alertmanager
-
 [masakari-api:children]
 control
 
diff --git a/ansible/inventory/multinode b/ansible/inventory/multinode
index c05a042732..a12c51dc9a 100644
--- a/ansible/inventory/multinode
+++ b/ansible/inventory/multinode
@@ -574,9 +574,6 @@ monitoring
 [prometheus-libvirt-exporter:children]
 compute
 
-[prometheus-msteams:children]
-prometheus-alertmanager
-
 [masakari-api:children]
 control
 
diff --git a/ansible/roles/prometheus/defaults/main.yml b/ansible/roles/prometheus/defaults/main.yml
index e2e7d75525..f248ae0d54 100644
--- a/ansible/roles/prometheus/defaults/main.yml
+++ b/ansible/roles/prometheus/defaults/main.yml
@@ -122,14 +122,6 @@ prometheus_services:
     image: "{{ prometheus_libvirt_exporter_image_full }}"
     volumes: "{{ prometheus_libvirt_exporter_default_volumes + prometheus_libvirt_exporter_extra_volumes }}"
     dimensions: "{{ prometheus_libvirt_exporter_dimensions }}"
-  prometheus-msteams:
-    container_name: "prometheus_msteams"
-    group: "prometheus-msteams"
-    enabled: "{{ enable_prometheus_msteams | bool }}"
-    environment: "{{ prometheus_msteams_container_proxy }}"
-    image: "{{ prometheus_msteams_image_full }}"
-    volumes: "{{ prometheus_msteams_default_volumes + prometheus_msteams_extra_volumes }}"
-    dimensions: "{{ prometheus_msteams_dimensions }}"
 
 ####################
 # Prometheus Server
@@ -235,10 +227,6 @@ prometheus_libvirt_exporter_image: "{{ docker_registry ~ '/' if docker_registry
 prometheus_libvirt_exporter_tag: "{{ prometheus_tag }}"
 prometheus_libvirt_exporter_image_full: "{{ prometheus_libvirt_exporter_image }}:{{ prometheus_libvirt_exporter_tag }}"
 
-prometheus_msteams_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_namespace }}/{{ docker_image_name_prefix }}prometheus-msteams"
-prometheus_msteams_tag: "{{ prometheus_tag }}"
-prometheus_msteams_image_full: "{{ prometheus_msteams_image }}:{{ prometheus_msteams_tag }}"
-
 prometheus_server_dimensions: "{{ default_container_dimensions }}"
 prometheus_mysqld_exporter_dimensions: "{{ default_container_dimensions }}"
 prometheus_node_exporter_dimensions: "{{ default_container_dimensions }}"
@@ -249,7 +237,6 @@ prometheus_openstack_exporter_dimensions: "{{ default_container_dimensions }}"
 prometheus_elasticsearch_exporter_dimensions: "{{ default_container_dimensions }}"
 prometheus_blackbox_exporter_dimensions: "{{ default_container_dimensions }}"
 prometheus_libvirt_exporter_dimensions: "{{ default_container_dimensions }}"
-prometheus_msteams_dimensions: "{{ default_container_dimensions }}"
 
 prometheus_server_default_volumes:
   - "{{ node_config_directory }}/prometheus-server/:{{ container_config_directory }}/:ro"
@@ -309,11 +296,6 @@ prometheus_libvirt_exporter_default_volumes:
   - "/etc/localtime:/etc/localtime:ro"
   - "{{ '/etc/timezone:/etc/timezone:ro' if ansible_facts.os_family == 'Debian' else '' }}"
   - "/run/libvirt:/run/libvirt:ro"
-prometheus_msteams_default_volumes:
-  - "{{ node_config_directory }}/prometheus-msteams/:{{ container_config_directory }}/:ro"
-  - "/etc/localtime:/etc/localtime:ro"
-  - "{{ '/etc/timezone:/etc/timezone:ro' if ansible_facts.os_family == 'Debian' else '' }}"
-  - "kolla_logs:/var/log/kolla/"
 
 prometheus_extra_volumes: "{{ default_extra_volumes }}"
 prometheus_server_extra_volumes: "{{ prometheus_extra_volumes }}"
@@ -326,9 +308,6 @@ prometheus_openstack_exporter_extra_volumes: "{{ prometheus_extra_volumes }}"
 prometheus_elasticsearch_exporter_extra_volumes: "{{ prometheus_extra_volumes }}"
 prometheus_blackbox_exporter_extra_volumes: "{{ prometheus_extra_volumes }}"
 prometheus_libvirt_exporter_extra_volumes: "{{ prometheus_extra_volumes }}"
-prometheus_msteams_extra_volumes: "{{ prometheus_extra_volumes }}"
-
-prometheus_msteams_container_proxy: "{{ container_proxy }}"
 
 prometheus_openstack_exporter_disabled_volume: "{{ '--disable-service.volume' if not enable_cinder | bool else '' }}"
 prometheus_openstack_exporter_disabled_dns: "{{ '--disable-service.dns' if not enable_designate | bool else '' }}"
diff --git a/ansible/roles/prometheus/handlers/main.yml b/ansible/roles/prometheus/handlers/main.yml
index dcdb7578d0..cf5a14abe7 100644
--- a/ansible/roles/prometheus/handlers/main.yml
+++ b/ansible/roles/prometheus/handlers/main.yml
@@ -150,19 +150,3 @@
     dimensions: "{{ service.dimensions }}"
   when:
     - kolla_action != "config"
-
-- name: Restart prometheus-msteams container
-  vars:
-    service_name: "prometheus-msteams"
-    service: "{{ prometheus_services[service_name] }}"
-  become: true
-  kolla_container:
-    action: "recreate_or_restart_container"
-    common_options: "{{ docker_common_options }}"
-    environment: "{{ service.environment }}"
-    name: "{{ service.container_name }}"
-    image: "{{ service.image }}"
-    volumes: "{{ service.volumes }}"
-    dimensions: "{{ service.dimensions }}"
-  when:
-    - kolla_action != "config"
diff --git a/ansible/roles/prometheus/tasks/config.yml b/ansible/roles/prometheus/tasks/config.yml
index 52a4d335d8..bd1918384d 100644
--- a/ansible/roles/prometheus/tasks/config.yml
+++ b/ansible/roles/prometheus/tasks/config.yml
@@ -234,33 +234,3 @@
     base: "{{ node_custom_config }}/prometheus/"
     service: "{{ prometheus_services['prometheus-server'] }}"
   when: service | service_enabled_and_mapped_to_host
-
-- name: Copying over prometheus msteams config file
-  vars:
-    service: "{{ prometheus_services['prometheus-msteams'] }}"
-  template:
-    src: "{{ item }}"
-    dest: "{{ node_config_directory }}/prometheus-msteams/msteams.yml"
-  become: true
-  when: service | service_enabled_and_mapped_to_host
-  with_first_found:
-    - "{{ node_custom_config }}/prometheus/{{ inventory_hostname }}/prometheus-msteams.yml"
-    - "{{ node_custom_config }}/prometheus/prometheus-msteams.yml"
-    - "{{ role_path }}/templates/prometheus-msteams.yml.j2"
-  notify:
-    - Restart prometheus-msteams container
-
-- name: Copying over prometheus msteams template file
-  vars:
-    service: "{{ prometheus_services['prometheus-msteams'] }}"
-  copy:
-    src: "{{ item }}"
-    dest: "{{ node_config_directory }}/prometheus-msteams/msteams.tmpl"
-  become: true
-  when: service | service_enabled_and_mapped_to_host
-  with_first_found:
-    - "{{ node_custom_config }}/prometheus/{{ inventory_hostname }}/prometheus-msteams.tmpl"
-    - "{{ node_custom_config }}/prometheus/prometheus-msteams.tmpl"
-    - "{{ role_path }}/templates/prometheus-msteams.tmpl"
-  notify:
-    - Restart prometheus-msteams container
diff --git a/ansible/roles/prometheus/tasks/precheck.yml b/ansible/roles/prometheus/tasks/precheck.yml
index 4aea7ed218..8b48dc138f 100644
--- a/ansible/roles/prometheus/tasks/precheck.yml
+++ b/ansible/roles/prometheus/tasks/precheck.yml
@@ -21,7 +21,6 @@
       - prometheus_elasticsearch_exporter
       - prometheus_blackbox_exporter
       - prometheus_libvirt_exporter
-      - prometheus_msteams
   check_mode: false
   register: container_facts
 
@@ -185,17 +184,3 @@
     - enable_prometheus_libvirt_exporter | bool
   with_items:
     - "{{ prometheus_libvirt_exporter_port }}"
-
-- name: Checking free ports for Prometheus msteams
-  wait_for:
-    host: "{{ 'api' | kolla_address }}"
-    port: "{{ item }}"
-    connect_timeout: 1
-    timeout: 1
-    state: stopped
-  when:
-    - container_facts['prometheus_msteams'] is not defined
-    - inventory_hostname in groups['prometheus-msteams']
-    - enable_prometheus_msteams | bool
-  with_items:
-    - "{{ prometheus_msteams_port }}"
diff --git a/ansible/roles/prometheus/templates/prometheus-alertmanager.yml.j2 b/ansible/roles/prometheus/templates/prometheus-alertmanager.yml.j2
index 19d974e5d7..6968791d24 100644
--- a/ansible/roles/prometheus/templates/prometheus-alertmanager.yml.j2
+++ b/ansible/roles/prometheus/templates/prometheus-alertmanager.yml.j2
@@ -6,17 +6,7 @@ route:
   group_wait: 10s
   group_interval: 5m
   repeat_interval: 3h
-{% if enable_prometheus_msteams | bool %}
-  routes:
-    - receiver: 'prometheus-msteams'
-{% endif %}
 receivers:
   - name: default-receiver
-{% if enable_prometheus_msteams | bool %}
-  - name: 'prometheus-msteams'
-    webhook_configs:
-    - send_resolved: true
-      url: 'http://localhost:{{ prometheus_msteams_port }}/alertmanager'
-{% endif %}
 templates:
   - '/etc/prometheus/*.tmpl'
diff --git a/ansible/roles/prometheus/templates/prometheus-msteams.json.j2 b/ansible/roles/prometheus/templates/prometheus-msteams.json.j2
deleted file mode 100644
index 758be92a72..0000000000
--- a/ansible/roles/prometheus/templates/prometheus-msteams.json.j2
+++ /dev/null
@@ -1,24 +0,0 @@
-{
-    "command": "/opt/prometheus-msteams -http-addr localhost:{{ prometheus_msteams_port }} -config-file /etc/msteams/msteams.yml -template-file /etc/msteams/msteams.tmpl",
-    "config_files": [
-        {
-            "source": "{{ container_config_directory }}/msteams.yml",
-            "dest": "/etc/msteams/msteams.yml",
-            "owner": "prometheus",
-            "perm": "0600"
-        },
-        {
-            "source": "{{ container_config_directory }}/msteams.tmpl",
-            "dest": "/etc/msteams/msteams.tmpl",
-            "owner": "prometheus",
-            "perm": "0600"
-        }
-    ],
-    "permissions": [
-        {
-            "path": "/var/log/kolla/prometheus",
-            "owner": "prometheus:kolla",
-            "recurse": true
-        }
-    ]
-}
diff --git a/ansible/roles/prometheus/templates/prometheus-msteams.yml.j2 b/ansible/roles/prometheus/templates/prometheus-msteams.yml.j2
deleted file mode 100644
index 49ad1d12dc..0000000000
--- a/ansible/roles/prometheus/templates/prometheus-msteams.yml.j2
+++ /dev/null
@@ -1,2 +0,0 @@
-connectors:
-  - alertmanager: "{{ prometheus_msteams_webhook_url }}"
diff --git a/etc/kolla/globals.yml b/etc/kolla/globals.yml
index 09eb0465a5..faa01de2aa 100644
--- a/etc/kolla/globals.yml
+++ b/etc/kolla/globals.yml
@@ -768,7 +768,6 @@ workaround_ansible_issue_8743: yes
 #enable_prometheus_blackbox_exporter: "{{ enable_prometheus | bool }}"
 #enable_prometheus_libvirt_exporter: "{{ enable_prometheus | bool and enable_nova | bool and nova_compute_virt_type in ['kvm', 'qemu'] }}"
 #enable_prometheus_etcd_integration: "{{ enable_prometheus | bool and enable_etcd | bool }}"
-#enable_prometheus_msteams: "no"
 
 # The labels to add to any time series or alerts when communicating with external systems (federation, remote storage, Alertmanager).
 # prometheus_external_labels:
diff --git a/releasenotes/notes/drop-prometheus-msteams-9f8a90f4f03745c6.yaml b/releasenotes/notes/drop-prometheus-msteams-9f8a90f4f03745c6.yaml
new file mode 100644
index 0000000000..370eacd7a8
--- /dev/null
+++ b/releasenotes/notes/drop-prometheus-msteams-9f8a90f4f03745c6.yaml
@@ -0,0 +1,7 @@
+---
+upgrade:
+  - |
+    Support for deploying ``prometheus-msteams`` has been dropped as the
+    project is no longer maintained. Users should migrate to the `native
+    Prometheus Alertmanager integration with Microsoft Teams
+    <https://prometheus.io/docs/alerting/latest/configuration/#msteams_config>`__.
diff --git a/tests/templates/inventory.j2 b/tests/templates/inventory.j2
index 92defd391a..e2beb53427 100644
--- a/tests/templates/inventory.j2
+++ b/tests/templates/inventory.j2
@@ -625,9 +625,6 @@ monitoring
 [prometheus-libvirt-exporter:children]
 compute
 
-[prometheus-msteams:children]
-prometheus-alertmanager
-
 # NOTE(yoctozepto): In CI we want to test Masakari HA but not of other services,
 # to conserve the resources. Hence, we set Masakari groups to use both
 # primary and secondary while the parent group (control) uses only primary.