1. Login into Azure portal on https://portal.azure.com and navigate to Virtual machines section.

2. Click on the one you would like to manage.

3. Obtain the following information:

• IP Address Name
• ResourceGroupName

4. Make sure that the IP address is set up to Static and the DNS name is specified.

5. Open Cloud Shell on the right-upper corner as shown below:

6. Run the following commands:

$pip = Get-AzureRmPublicIpAddress -Name "PublicIp" -ResourceGroupName "MyResourceGroup"

$pip.DnsSettings.reverseFqdn = "your.rdnsrecord.com"

Set-AzureRmPublicIpAddress -PublicIpAddress $pip