Find Azure Application Insights Resource by InstrumentationKey

I had a need to query some Application Insights logs, but all I had was the InstrumentationKey.

I didn't want to open each of the Application Insights instances and check the key (there were a lot), but as long as you have the Azure "Az" Powershell Module installed, you can run this script to print out all App Insights instances and their associated Instrumentation Key:

https://gist.github.com/aaronhoffman/cf5bd0c59216b3e6a57c0c6ea134cafb

	# for each subscription in context
	foreach ($subId in (Get-AzSubscription).Id | Get-Unique) {
	write-host "Subscription $subId"
	# set context to the given subId
	Set-AzContext -SubscriptionId $subId
	# List the name and InstrumentationKey of all Application Insights resources in this sub
	Get-AzResource -ResourceType Microsoft.Insights/components -ExpandProperties | select -ExpandProperty Properties | select Name, InstrumentationKey | ft
	}

Hope this helps!

Aaron