diff --git a/CHANGELOG.next.asciidoc b/CHANGELOG.next.asciidoc
index c4f979f7f3b..7defd220e5e 100644
--- a/CHANGELOG.next.asciidoc
+++ b/CHANGELOG.next.asciidoc
@@ -302,6 +302,7 @@ https://github.com/elastic/beats/compare/v7.0.0-alpha2...master[Check the HEAD d
 - Fix k8s scheduler compatibility issue. {pull}19699[19699]
 - Fix SQL module mapping NULL values as string {pull}18955[18955] {issue}18898[18898
 - Modify doc for app_insights metricset to contain example of config. {pull}20185[20185]
+- Add required option for `metrics` in app_insights. {pull}20406[20406]
 - Groups same timestamp metric values to one event in the app_insights metricset. {pull}20403[20403]
 
 *Packetbeat*
diff --git a/metricbeat/docs/modules/azure.asciidoc b/metricbeat/docs/modules/azure.asciidoc
index 248350e3fb1..e4cd4835473 100644
--- a/metricbeat/docs/modules/azure.asciidoc
+++ b/metricbeat/docs/modules/azure.asciidoc
@@ -241,7 +241,8 @@ metricbeat.modules:
   period: 300s
   application_id: ''
   api_key: ''
-
+  metrics:
+    - id: ["requests/count", "requests/duration"]
 ----
 
 [float]
diff --git a/x-pack/metricbeat/metricbeat.reference.yml b/x-pack/metricbeat/metricbeat.reference.yml
index 457a2c2bfe7..a2183e895f4 100644
--- a/x-pack/metricbeat/metricbeat.reference.yml
+++ b/x-pack/metricbeat/metricbeat.reference.yml
@@ -340,7 +340,8 @@ metricbeat.modules:
   period: 300s
   application_id: ''
   api_key: ''
-
+  metrics:
+    - id: ["requests/count", "requests/duration"]
 
 #--------------------------------- Beat Module ---------------------------------
 - module: beat
diff --git a/x-pack/metricbeat/module/azure/_meta/config.reference.yml b/x-pack/metricbeat/module/azure/_meta/config.reference.yml
index 129384d1498..1f9ac04529e 100644
--- a/x-pack/metricbeat/module/azure/_meta/config.reference.yml
+++ b/x-pack/metricbeat/module/azure/_meta/config.reference.yml
@@ -100,4 +100,5 @@
   period: 300s
   application_id: ''
   api_key: ''
-
+  metrics:
+    - id: ["requests/count", "requests/duration"]
diff --git a/x-pack/metricbeat/module/azure/_meta/config.yml b/x-pack/metricbeat/module/azure/_meta/config.yml
index 914f5ed5774..0f497af6fb4 100644
--- a/x-pack/metricbeat/module/azure/_meta/config.yml
+++ b/x-pack/metricbeat/module/azure/_meta/config.yml
@@ -109,3 +109,5 @@
 #  period: 300s
 #  application_id: ''
 #  api_key: ''
+#  metrics:
+#   - id: ["requests/count", "requests/duration"]
diff --git a/x-pack/metricbeat/module/azure/app_insights/app_insights.go b/x-pack/metricbeat/module/azure/app_insights/app_insights.go
index e3a087ad7ce..8ffe02eb860 100644
--- a/x-pack/metricbeat/module/azure/app_insights/app_insights.go
+++ b/x-pack/metricbeat/module/azure/app_insights/app_insights.go
@@ -22,7 +22,7 @@ type Config struct {
 	ApplicationId string        `config:"application_id"    validate:"required"`
 	ApiKey        string        `config:"api_key" validate:"required"`
 	Period        time.Duration `config:"period" validate:"nonzero,required"`
-	Metrics       []Metric      `config:"metrics"`
+	Metrics       []Metric      `config:"metrics" validate:"required"`
 }
 
 // Metric struct used for configuration options
diff --git a/x-pack/metricbeat/modules.d/azure.yml.disabled b/x-pack/metricbeat/modules.d/azure.yml.disabled
index 857bfd6619f..23211f47206 100644
--- a/x-pack/metricbeat/modules.d/azure.yml.disabled
+++ b/x-pack/metricbeat/modules.d/azure.yml.disabled
@@ -112,3 +112,5 @@
 #  period: 300s
 #  application_id: ''
 #  api_key: ''
+#  metrics:
+#   - id: ["requests/count", "requests/duration"]