AMA Updates

docs/wiki/Whats-new.md

@@ -1,6 +1,7 @@
 ## In this Section
 
 - [Updates](#updates)
+  - [🆕 AMA Updates](#-ama-updates)
   - [🔃 Policy Refresh H2 FY24](#-policy-refresh-h2-fy24)
   - [May 2024](#may-2024)
   - [April 2024](#april-2024)
@@ -44,6 +45,26 @@ This article will be updated as and when changes are made to the above and anyth
 
 Here's what's changed in Enterprise Scale/Azure Landing Zones:
 
+### 🆕 AMA Updates
+
+The ALZ Portal Accelerator has been enhanced with the latest AMA updates, ensuring a seamless and efficient management experience. 🚀
+
+Key updates include:
+
+- Azure Landing zones is now using a single centralized User Assigned Managed Identity. The centralization of User Assigned Managed Identity for Azure Monitor Agent (AMA) marks a significant advancement in our ability to manage large-scale deployments efficiently.
+  - The User Assigned Managed Identity `id-ama-prod-<location>-001` is created in resource group `<enterpriseScaleCompanyPrefix>-mgmt` in the management subscription or in the platform subscription when selecting 'Single' in the Platform subscription options.
+  - The feature flag `restrictBringYourOwnUserAssignedIdentityToSubscription` has been added to the policies and initiatives that enables the use of a single centralized User Assigned Managed Identity.
+    - `restrictBringYourOwnUserAssignedIdentityToSubscription` set as True (Policy/Initiative default): Restricts the bring your own UAMI to a UAMI from the same subscription as the VM.
+    - `restrictBringYourOwnUserAssignedIdentityToSubscription` set as False (**ALZ Default**): Removes that restriction and allows you to assign your own UAMI from any subscription within the tenant/ scope of assignment.
+  - We've updated the following built-in policy initiatives to support single User Assigned Managed Identities:
+    - [Enable Azure Monitor for VMs with Azure Monitoring Agent(AMA)](https://www.azadvertizer.net/azpolicyinitiativesadvertizer/924bfe3a-762f-40e7-86dd-5c8b95eb09e6.html)
+    - [Enable Azure Monitor for VMSS with Azure Monitoring Agent(AMA)](https://www.azadvertizer.net/azpolicyinitiativesadvertizer/f5bf694c-cca7-4033-b883-3a23327d5485.html)
+    - [Configure SQL VMs and Arc-enabled SQL Servers to install Microsoft Defender for SQL and AMA with a user-defined LA workspace](https://www.azadvertizer.net/azpolicyinitiativesadvertizer/de01d381-bae9-4670-8870-786f89f49e26.html)
+    - [[Preview]: Enable ChangeTracking and Inventory for virtual machines](https://www.azadvertizer.net/azpolicyinitiativesadvertizer/92a36f05-ebc9-4bba-9128-b47ad2ea3354.html)
+    - [[Preview]: Enable ChangeTracking and Inventory for virtual machine scale sets](https://www.azadvertizer.net/azpolicyinitiativesadvertizer/c4a70814-96be-461c-889f-2b27429120dc.html)
+- Custom [Defender for SQL initiative](https://raw.githubusercontent.com/Azure/Enterprise-Scale/main/src/resources/Microsoft.Authorization/policySetDefinitions/Deploy-MDFC-DefenderSQL-AMA.json) has been deprecated and is replaced by [Configure SQL VMs and Arc-enabled SQL Servers to install Microsoft Defender for SQL and AMA with a user-defined LA workspace](https://www.azadvertizer.net/azpolicyinitiativesadvertizer/de01d381-bae9-4670-8870-786f89f49e26.html)
+- Custom [User Assigned Managed Identity policy](https://raw.githubusercontent.com/Azure/Enterprise-Scale/main/src/resources/Microsoft.Authorization/policyDefinitions/Deploy-UserAssignedManagedIdentity-VMInsights.json) has been deprecated. UAMI for AMA is now centrally deployed therefore this policy is no longer required.
+
 ### 🔃 Policy Refresh H2 FY24
 
 We've missed Q3 timelines completely, but for good reason. We've held back this cycle of Policy Refresh in order to address some key initiatives that we feel are critical to the success of our customers. This is the single largest update to the ALZ Policy since the inception of the project. We're excited to share these updates with you, and we're confident that they will provide significant value to your deployments and the compliance of your Azure Landing Zones.

eslzArm/eslz-portal.json

@@ -466,19 +466,6 @@
                                 }
                             }
                         },
-                        {
-                            "name": "userAssignedIdentityResourceGroup",
-                            "type": "Microsoft.Common.TextBox",
-                            "label": "Resource group for the User Assigned Managed Identity for AMA",
-                            "toolTip": "Resource group for the User Assigned Managed Identity for Azure Monitor Agent. Will be created in all subscriptions in scope for the policy",
-                            "visible": "[equals(steps('management').enableLogAnalytics,'Yes')]",
-                            "defaultValue": "rg-ama-prod-001",
-                            "constraints": {
-                                "required": "[equals(steps('management').enableLogAnalytics,'Yes')]",
-                                "regex": "^[a-zA-Z0-9][a-zA-Z0-9-_.()]{0,89}[a-zA-Z0-9]$",
-                                "validationMessage": "Please provide a valid resource group name"
-                            }
-                        },
                         {
                             "name": "enableChangeTracking",
                             "type": "Microsoft.Common.OptionsGroup",
@@ -7883,7 +7870,6 @@
                 "enforceAcsb": "[steps('landingZones').lzSection.enforceAcsb]",
                 "enableDecommissioned": "[steps('decommissionedSandboxZones').decommSection.enableDecommissioned]",
                 "enableSandbox": "[steps('decommissionedSandboxZones').sandboxSection.enableSandbox]",
-                "userAssignedIdentityResourceGroup": "[steps('management').userAssignedIdentityResourceGroup]",
                 "enableWsCMKInitiatives": "[steps('workloadspecific').enableWsCMKInitiatives]",
                 "wsCMKSelectorMG": "[steps('workloadspecific').wsCMKSelectorMG]",
                 "enableWsAPIMInitiatives": "[steps('workloadspecific').enableWsAPIMInitiatives]",