Added faq article and updated toc (MicrosoftDocs#1523)

Author: mikefrobbins

docs-conceptual/azps-4.5.0/faq.md

@@ -0,0 +1,26 @@
+---
+title: Frequently Asked Questions (FAQ)
+description: Frequently Asked Questions about Azure PowerShell.
+ms.devlang: powershell
+ms.topic: conceptual
+ms.date: 08/17/2020
+---
+
+# Frequently asked questions about Azure PowerShell
+
+## What is Azure PowerShell?
+
+Azure PowerShell is a set of cmdlets that allows you to manage Azure resources directly with
+PowerShell. In December 2018, the Az PowerShell module became generally available. It's now the
+recommended PowerShell module for interacting with Azure. To learn more about the Az PowerShell
+module, see
+[Introducing the new Azure PowerShell Az module](/powershell/azure/new-azureps-module-az).
+
+## How do I disable breaking change warning messages in Azure PowerShell?
+
+To suppress the breaking change warning messages in Azure PowerShell, you'll need to set the
+environment variable `SuppressAzurePowerShellBreakingChangeWarnings` to `true`.
+
+```azurepowershell
+Set-Item -Path Env:\SuppressAzurePowerShellBreakingChangeWarnings -Value $true
+```

docs-conceptual/azps-4.5.0/toc.yml

@@ -98,3 +98,5 @@
       href: migrate-az-3.0.0.md
     - name: Az 4.1.0 breaking changes
       href: migrate-az-4.1.0.md
+- name: Frequently Asked Questions
+  href: faq.md