Forum Discussion
Can't install Azure ARC on multiple Server 2025 devices
I have multiple Server 2025 devices that when I click "Launch Azure Arc Setup" button on taskbar icon or "Azure Arc Setup" on start menu nothing happens. I then tried to download arcsetup.exe and it never advanced beyond the initializing Windows Installer screen. I got it to work on one server and 4-5 all have the same problem. Both physical and VM. Below are errors in the event log.
4 Replies
Similar experience here, thanks for confirming it's not just me! - Server 2025 VM Template created on-prem from November 24 ISO. AzureArcSetup.exe ran fine. But after I'd applied the Mar 2025 updates, I received a .Net Runtime error everytime.
I noticed the AzureArcSetup.exe was dated March25, so I've tried extracting the original .exe (March 24) and dlls from the ISO, but this doesn't change the issue, likely it is something in the OS rather than the .exe causing it.
For the moment I'm going to include the 'arcsetup.exe' in the template and launch that instead. I hope MS address the issue in a future update.
Same issue for me. With a fresh Server 2025 ISO (24H2 - November 2024) the setup launched correctly. With a Server 2025 ISO (24H2.5 - March 2025) the setup does not launch correctly.
Two things you can try:
- Log into Azure at this link: https://portal.azure.com/#create/Microsoft.HybridCompute and pick the "Add Windows Server with installer" option to download a updated installer called arcsetup.exe.
- Click the first or second option on that same page and run a onboarding script (See https://learn.microsoft.com/en-us/azure/network-watcher/connection-monitor-connected-machine-agent?tabs=WindowsScript )
Downloading the updated setup file worked for me. I'm guessing there is a bug in the one included in the 24H2.5 March ISO.
I downloaded from that link on March 19 and got 95 MB file. I downloaded again today and 107 MB. They definitely replaced the file in last two weeks. The new installer gets farther but still doesn't seem to complete?
Hi, from the logs, it looks like there’s a parsing issue (System.FormatException) when AzureArcSetup.exe tries to interpret a version string. This could be related to how Azure Arc Setup is interpreting the OS version or a malformed environment variable.
