Hi,
Something here might help:
Associate a public IP address to a virtual machine
https://learn.microsoft.com/en-us/azure/virtual-network/associate-public-ip-address-vm
Create, change, or delete a public IP address
https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-public-ip-address
You'll also find more Azure networking experts in the dedicated forum over here:
https://social.msdn.microsoft.com/Forums/en-US/home?forum=WAVirtualMachinesVirtualNetwork
(Please don't forget to mark helpful replies as answer)
Best regards,
Leon