Get-AzResourceGroup on -Id requires Set-AzContext to given sub first, unlike how Get-AzResource works

[o-l-a-v]

Description

Get-AzResourceGroup -Id <resourcegroupid> fail with "Provided resource group does not exist", until you Set-AzContext to the subscription the resource group in question is located.

This is inconsistent with how Get-AzResource -ResourceId works. If -ResourceId is given, the rest call uses it vs. current Az scope.

Issue script & Debug output

# Assets
$Sub1Guid = 'some_guid'
$Sub2Guid = 'some_other_guid'
$RgName   = 'some_rg_name'

# Generate resource id of the resource group in question
$ResourceGroupId = '/subscriptions/{0}/resourceGroups/{1}' -f $Sub2Guid, $RgName

# Set context to sub1
Set-AzContext -Subscription $Sub1Guid

# Try to get rg on resource id => Fails
Get-AzResourceGroup -Id $ResourceGroupId

# Set context to sub2
Set-AzContext -Subscription $Sub2Guid

# Try to get rg on resource id => Succeeds
Get-AzResourceGroup -Id $ResourceGroupId

Environment data

Windows PowerShell 5.1

Module versions

Az.Resources 6.6.1

Error output

No response

[isra-fel]

We are investigating the root cause. At first glance it looks like a bug of Get-AzResourceGroup to only take resource group name from the id.