Merge pull request #307060 from AkshitGureja/update-prerequisites-mars-agent

Update prerequisites mars agent

Author: v-ccolin

articles/backup/install-mars-agent.md

@@ -128,6 +128,12 @@ To install and register  the MARRS agent, follow these steps:
     ![Screenshot shows how to set up internet access in the MARS wizard.](./media/backup-configure-vault/mars2.png)
 
 1. For **Installation**, review the prerequisites, and select **Install**.
+
+   >[!Note]
+   >MARS agent installation requires Windows Powershell 5.0 and Microsoft .NET Framework 4.8 (previously 4.5). You might need to install the .NET Framework 4.8 manually when upgrading from version 4.5.
+
+    ![Screenshot shows the prerequisites required to configure MARS agent.](./media/backup-configure-vault/mars-prerequisite.png)
+   
 1. After the agent is installed, select **Proceed to Registration**.
 1. In **Register Server Wizard** > **Vault Identification**, browse to and select the credentials file that you downloaded. Then select **Next**.