I need to update the company portal app on some of our ipads, as it won't let you log in without doing the update. We block the app store, so I can't do an update without removing the block app store policy.
Distribute Company Portal as a required VPP app using device licensing. Then, turn on Automatic app updates in the VPP settings. Take note that this currently only applies to apps that are set as required, not available. Hope this helps.