Azure Arc Configuration - The given key was not present in the dictonary (GUI only)

Question

Hello Community,

I am trying to join Windows Server 2022 and Windows Server 2025 using the new Azure Arc Configuration GUI.

Using the Azure Arc Configuration GUI always and on both systems gives me "the given key was not present in the dictionary when after choosing the Resource Group and the GUI trying to populate the Azure Region.

Doing the same thing running this script with the same user and settings works perfectly: azcmagent connect --subscription-id "xxxxxxxxxxxxxxx" --resource-group "weu-rg-azurearc" --location "westeurope"

I already went down the path to try it with the supported Windows Server OS and even re-created an Azure Tenant & Subscriptions and multiple Resource Groups. The result in all scenarios on all Windows Servers using the GUI was the same.

Anyone has an idea on what to try next?

Thanks,
Andreas

Answer 1

This issue is confirmed to be a bug. Fix is underway.
reference: This issue is confirmed to be a bug.reference: https://techcommunity.microsoft.com/t5/windows-server-insiders/b26085-two-kind-of-arc-setup-wizard-troubles/m-p/4131358#M3607