How can I determine which version of Appian our cloud environments currently are

Mike,

I'd recommend getting in touch with Appian Support to provide you with the version of Appian you are running for your Cloud instance.

Okay, thanks. I will do that.

(1) Export an application from your environment
(2) Download the .zip file
(3) Open the .zip file (so that you can see the file structure)
(4) Open the folder META_INF
(5) Open the file MANIFEST.MF

The Appian version will be listed in this document (e.g. Appian-Version: 17.4.29.0)

A similar question was asked and answered here: https://community.appian.com/discussions/f/general/9946/how-to-get-current-version-of-appian