The Hub (aka Intelligent Hub) app
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If you open the Hub app, you can see the enrollment account ID and also the date and time when the app last checked in with Workspace ONE (if you do not see that, tap the left-pointing-arrow in the upper left corner of the screen).
You can also use the Hub app to test connectivity to Workspace ONE by tapping on This Device and then tapping Send Data.
If you open the Hub app and it prompts you to enter a username and password (the enrollment credentials), but you do not know what to enter, send an email to ipads@desalesmedia.org and include the serial number of the iPad.
If you do not see the Hub app on an iPad, open Settings and look in the upper left corner. You should see a message like this:
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If you do not see a message like that, this iPad was not provided by or managed by DeSales Media.