Azure ExpiredAuthenticationToken during New-AzureRmResourceGroupDeployment when deploying resources via Visual Studio

What's happening here is that the Azure Resource Group deployment in VS uses the PowerShell Script in the project to do deployment (even though the output is hosted in VS, we use that PS script to do the work). The PowerShell script is authenticated by using the token from your VS sign in. That token is only good for an hour and then VS will refresh it. Once it's handed off to PowerShell though, PowerShell doesn't automatically refresh it. So if you have the token for 59 minutes, it's going to expire soon after you start the deployment. The token could last for an hour, or anything less than that. We're working on a fix for this (i.e. have PowerShell automatically refresh the token) but that's a month or so out yet. See: https://github.com/Azure/azure-powershell/issues/1068

Workarounds: Unfortunately there's no good work around from VS. But...

• As observed the deployment will continue just fine in Azure, it's just that VS/PS can no longer poll for status. You can monitor the deployment via the portal or PowerShell.
• If you drop to PowerShell and run the script, PowerShell will automatically refresh the token when you login with credentials - you can get the exact command that VS runs by sifting through the output window - this doc also gives an overview of running the script manually: https://azure.microsoft.com/en-us/documentation/articles/vs-azure-tools-resource-groups-how-script-works/

Hope that helps...