topic Re: 12.0 Web Adaptor Installation in ArcGIS Enterprise Questions

12.0 Web Adaptor Installation

NICK_COG — Tue, 02 Dec 2025 17:40:43 GMT

Hello,

I am trying to deploy ArcGIS 12.0 in our development environment. We are moving from ArcGIS Enterprise 11.5. I was able to install Portal without any issue, but when I go to install the Web Adaptor for Portal I am getting stuck.

After running the downloaded ArcGIS Web Adaptor (IIS).exe file the Set Up Wizard does not launch. When I go to the downloaded files at the specified installation path and run Setup.exe nothing launches either. I tried downloading a fresh file from MyEsri and restarting the process, but that has not helped either.

I have checked and verified I have the correct .NET 8.0.7 and Microsoft Web Deploy 4.0.

I tried to manually run ConfigureIIS as outlined here: https://support.esri.com/en-us/knowledge-base/only-one-instance-can-be-installed-of-arcgis-web-adapto-000038798#:~:text=Description,shown%20in%20the%20image%20below.

and received this error:

Any thoughts on what could be going on?

Re: 12.0 Web Adaptor Installation

CodyPatterson — Tue, 02 Dec 2025 17:53:05 GMT

Hey @NICK_COG

On a few articles I found that the Microsoft Visual C++ files may be missing or broken in some way. I would try to reinstall the package from Microsoft to see if that gets things working: https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170

You can also try to do the elevated command prompt one-trick wonder that never seems to work for me but others have had success using this without quotes "sfc /scannow" which could repair the file!

Cody

Re: 12.0 Web Adaptor Installation

NICK_COG — Tue, 02 Dec 2025 18:39:25 GMT

That did it! Thanks a million.

Re: 12.0 Web Adaptor Installation

CodyPatterson — Tue, 02 Dec 2025 18:48:53 GMT

Hey @NICK_COG

Great to hear! Hopefully the rest of the installations go smooth!

Cody

Re: 12.0 Web Adaptor Installation

JoeRathvon — Fri, 12 Dec 2025 19:54:29 GMT

Thanks for this. It did the trick. now to try and get back the past few hours.