diff --git a/src/core/README.md b/src/core/README.md
index 4a178e321..4fdd3043c 100644
--- a/src/core/README.md
+++ b/src/core/README.md
@@ -216,6 +216,7 @@
 | [azurerm_key_vault_secret.apim_services_subscription_key](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
 | [azurerm_key_vault_secret.app_backend_ALLOW_MYPORTAL_IP_SOURCE_RANGE](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
 | [azurerm_key_vault_secret.app_backend_API_KEY](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
+| [azurerm_key_vault_secret.app_backend_APP_CITIZEN_APIM_KEY](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
 | [azurerm_key_vault_secret.app_backend_APP_MESSAGES_API_KEY](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
 | [azurerm_key_vault_secret.app_backend_APP_MESSAGES_BETA_FISCAL_CODES](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
 | [azurerm_key_vault_secret.app_backend_CGN_API_KEY](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
@@ -255,6 +256,8 @@
 | [azurerm_key_vault_secret.smtp](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/key_vault_secret) | data source |
 | [azurerm_linux_function_app.app_messages_1](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
 | [azurerm_linux_function_app.app_messages_2](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
+| [azurerm_linux_function_app.citizen_func_01](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
+| [azurerm_linux_function_app.citizen_func_02](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
 | [azurerm_linux_function_app.eucovidcert](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
 | [azurerm_linux_function_app.function_app](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
 | [azurerm_linux_function_app.function_assets_cdn](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/data-sources/linux_function_app) | data source |
diff --git a/src/core/app_backend.tf b/src/core/app_backend.tf
index 3f4911473..e32b62738 100644
--- a/src/core/app_backend.tf
+++ b/src/core/app_backend.tf
@@ -42,7 +42,7 @@ locals {
       CGN_OPERATOR_SEARCH_API_KEY = data.azurerm_key_vault_secret.app_backend_CGN_OPERATOR_SEARCH_API_KEY_PROD.value
       EUCOVIDCERT_API_URL         = "https://${data.azurerm_linux_function_app.eucovidcert.default_hostname}/api/v1"
       EUCOVIDCERT_API_KEY         = data.azurerm_key_vault_secret.fn_eucovidcert_API_KEY_APPBACKEND.value
-      APP_MESSAGES_API_KEY        = data.azurerm_key_vault_secret.app_backend_APP_MESSAGES_API_KEY.value
+      APP_MESSAGES_API_KEY        = data.azurerm_key_vault_secret.app_backend_APP_CITIZEN_APIM_KEY.value
       LOLLIPOP_API_URL            = "https://${data.azurerm_linux_function_app.lollipop_function.default_hostname}"
       LOLLIPOP_API_KEY            = data.azurerm_key_vault_secret.app_backend_LOLLIPOP_ITN_API_KEY.value
       TRIAL_SYSTEM_API_URL        = "https://ts-p-itn-api-func-01.azurewebsites.net" # PROD-TRIAL subscription
@@ -279,19 +279,19 @@ locals {
       IS_APPBACKENDLI = "false"
       // FUNCTIONS
       API_URL              = "https://${data.azurerm_linux_function_app.function_app[1].default_hostname}/api/v1"
-      APP_MESSAGES_API_URL = "https://${data.azurerm_linux_function_app.app_messages_1.default_hostname}/api/v1"
+      APP_MESSAGES_API_URL = "https://api-app.internal.io.pagopa.it/messages/l1/api/v1"
     }
     app_settings_l2 = {
       IS_APPBACKENDLI = "false"
       // FUNCTIONS
       API_URL              = "https://${data.azurerm_linux_function_app.function_app[1].default_hostname}/api/v1"
-      APP_MESSAGES_API_URL = "https://${data.azurerm_linux_function_app.app_messages_2.default_hostname}/api/v1"
+      APP_MESSAGES_API_URL = "https://api-app.internal.io.pagopa.it/messages/l2/api/v1"
     }
     app_settings_li = {
       IS_APPBACKENDLI = "true"
       // FUNCTIONS
       API_URL              = "https://${data.azurerm_linux_function_app.function_app[1].default_hostname}/api/v1" # not used
-      APP_MESSAGES_API_URL = "https://${data.azurerm_linux_function_app.app_messages_1.default_hostname}/api/v1"  # not used
+      APP_MESSAGES_API_URL = "https://api-app.internal.io.pagopa.it/messages/l1/api/v1"                           # not used
     }
   }
 
@@ -465,6 +465,11 @@ data "azurerm_key_vault_secret" "app_backend_APP_MESSAGES_API_KEY" {
   key_vault_id = data.azurerm_key_vault.key_vault_common.id
 }
 
+data "azurerm_key_vault_secret" "app_backend_APP_CITIZEN_APIM_KEY" {
+  name         = "appbackend-APP-CITIZEN-APIM-KEY"
+  key_vault_id = data.azurerm_key_vault.key_vault_common.id
+}
+
 data "azurerm_key_vault_secret" "app_backend_APP_MESSAGES_BETA_FISCAL_CODES" {
   name         = "appbackend-APP-MESSAGES-BETA-FISCAL-CODES"
   key_vault_id = data.azurerm_key_vault.key_vault_common.id
diff --git a/src/core/data.tf b/src/core/data.tf
index 9f1a90865..c30e0fe91 100644
--- a/src/core/data.tf
+++ b/src/core/data.tf
@@ -283,6 +283,16 @@ data "azurerm_linux_function_app" "app_messages_2" {
   name                = "${local.project}-app-messages-fn-2"
 }
 
+data "azurerm_linux_function_app" "citizen_func_01" {
+  resource_group_name = "io-p-itn-msgs-rg-01"
+  name                = "io-p-itn-msgs-citizen-func-01"
+}
+
+data "azurerm_linux_function_app" "citizen_func_02" {
+  resource_group_name = "io-p-itn-msgs-rg-01"
+  name                = "io-p-itn-msgs-citizen-func-02"
+}
+
 #
 # ELT
 #
diff --git a/src/core/env/prod/terraform.tfvars b/src/core/env/prod/terraform.tfvars
index d7cf7f363..a139ae1de 100644
--- a/src/core/env/prod/terraform.tfvars
+++ b/src/core/env/prod/terraform.tfvars
@@ -98,8 +98,8 @@ apim_publisher_name = "IO"
 apim_v2_sku         = "Premium_2"
 apim_autoscale = {
   enabled                       = true
-  default_instances             = 2
-  minimum_instances             = 2
+  default_instances             = 5
+  minimum_instances             = 4
   maximum_instances             = 6
   scale_out_capacity_percentage = 50
   scale_out_time_window         = "PT3M"