10.3 and 10.2.1 simultaneously on separate servers

[KathleenWallis]

I have an ELA and can run more than 1 ArcGIS server. I am currently at 10.2.1 and would like to upgrade to
10.3, however I have a 3^rd party application that does not support 10.3. Can I run 10.3 on one server while still
keeping 10.2.1 on the other server which will be used ONLY for publishing the service for the 3^rd party application?

[JayantaPoddar]

Hi Kathleen,

I think it can be done. Just remember to configure corresponding web adaptors in those Servers.

Give it a try and let us know.

Thanks,

Jay