Add Log Analytics workspace deletion guide and update deployment notes

Author: Abdul-Microsoft

docs/DeploymentGuide.md

@@ -326,6 +326,7 @@ If you are done trying out the application, you can delete all resources by runn
 ```shell
 azd down
 ```
+> **Note:** If you deployed with `enableRedundancy=true` and Log Analytics workspace replication is enabled, you must first disable replication before running `azd down` else resource group delete will fail. Follow the steps in [Handling Log Analytics Workspace Deletion with Replication Enabled](./LogAnalyticsReplicationDisable.md), wait until replication returns `false`, then run `azd down`.
 
 # Local setup
 

docs/LogAnalyticsReplicationDisable.md

@@ -0,0 +1,28 @@
+# 🛠 Handling Log Analytics Workspace Deletion with Replication Enabled
+
+If redundancy (replication) is enabled for your Log Analytics workspace, you must disable it before deleting the workspace or resource group. Otherwise, deletion will fail.
+
+## ✅ Steps to Disable Replication Before Deletion
+Run the following Azure CLI command. Note: This operation may take about 5 minutes to complete.
+
+```bash
+az resource update --ids "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.OperationalInsights/workspaces/{logAnalyticsName}" --set properties.replication.enabled=false
+```
+
+Replace:
+- `{subscriptionId}` → Your Azure subscription ID
+- `{resourceGroupName}` → The name of your resource group
+- `{logAnalyticsName}` → The name of your Log Analytics workspace
+
+Optional: Verify replication disabled (should output `false`):
+```bash
+az resource show --ids "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.OperationalInsights/workspaces/{logAnalyticsName}" --query properties.replication.enabled -o tsv
+```
+
+## ✅ After Disabling Replication
+You can safely delete:
+- The Log Analytics workspace (manual)
+- The resource group (manual), or
+- All provisioned resources via `azd down`
+
+Return to: [Deployment Guide](./DeploymentGuide.md)