Is the 10.3 IIS Web Adapter Backward compatible?

[KurtJanssen1]

For instance can I install the 10.3 web adapter to access 10.2 Servers?

[TobiasFimpel1]

I tried and it didn't allow me to register a 10.3 Web Adaptor with a 10.2.2 ArcGIS Server Site. 

[JamesMonty1]

From the server installation guide found here: Installing ArcGIS Web Adaptor—Installation Guides | ArcGIS for Server

"The ArcGIS Web Adaptor version must always match the version of its registered ArcGIS Server site."

So the way I read this, if you have 10.2 servers, you will need to install 10.2 web adaptors

[KurtJanssen1]

Thanks for the responses guys. You saved me trying it this weekend.

[KurtJanssen1]

Having now migrated to a new Webserver I wanted to update you on what I found. I decided to try it anyhow.

I have successfully registered 10.2.1, 10.2.2 and 10.3 ArcGIS Servers with 10.3 web adapters. It was completely painless and has worked a treat.

It appears that 10.3 web adapters are backward compatible. Well this is my experience anyhow.