Need to bulk update Acrobat Reader Dc via Intune for 28 users, but the Adobe business team told us that they can't help to update any free version. Adobe Pro Dc updates itself but we have users on the free version as well.
If it isn't a customised deployment you can just deploy the MSI. I assume though it is a customised deployment if someone turned off custom updates, and this makes things more complex; re-slipstreaming the MSI to the deployment base may be needed. For both apps, there may be relevant info in https://www.adobe.com/devnet-docs/acrobatetk/
check your Acrobat Reader distribution license is up to date. Security fixes are frequent and important, maybe use SCUP to keep up to date.