Add AVM Post Deployment Guide

Author: Harsh-Microsoft

documents/AVMPostDeploymentGuide

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+# AVM Post Deployment Guide
+
+This document provides guidance on post-deployment steps after deploying the Conversation Knowledge Mining solution accelerator from the [AVM (Azure Verified Modules) repository](https://github.com/Azure/bicep-registry-modules/tree/main/avm/ptn/sa/conversation-knowledge-mining).
+
+## Prerequisites
+
+- **Deployed Infrastructure** - A successful Conversation Knowledge Mining solution accelerator deployment from the [AVM repository](https://github.com/Azure/bicep-registry-modules/tree/main/avm/ptn/sa/conversation-knowledge-mining)
+
+## Post Deployment Steps
+
+### 1. Access the Application
+
+1. Navigate to the [Azure Portal](https://portal.azure.com)
+2. Open the resource group created during deployment
+3. Locate the App Service with name starting with `app-`
+4. Copy the **URL** from the Overview page
+5. Open the URL in your browser to access the application
+
+### 2. Configure Authentication (Optional)
+
+If you want to enable authentication, configure it by following the [App Authentication Guide](./AppAuthentication.md).
+
+### 3. Verify Data Processing
+
+- Check that sample data has been uploaded to the storage account
+- Verify that the AI Search index has been created and populated
+- Confirm that the application loads without errors
+
+## Getting Started
+
+### Sample Questions
+
+Try these questions in the application to explore the solution capabilities:
+
+- "Total number of calls by date for the last 7 days"
+- "Show average handling time by topics in minutes"
+- "What are the top 7 challenges users reported?"
+- "Give a summary of billing issues"
+- "When customers call in about unexpected charges, what types of charges are they seeing?"
+
+---
+
+> **📋 Note**: This guide is specifically for post-deployment steps after using the AVM template. For complete deployment instructions, see the main [Deployment Guide](./DeploymentGuide.md).