Add SSO, which uses the local domain controller to login into Proton Pass. This would make multi-user password managers more easy to integrate in to the ecosystem. Else each employee has a separate password for the Protonpass.
If possible, create Proton Pass account for selected accounts in the Domain Controller. This is to automate the process of making an account for each employee

This makes it easier for a business to add Proton Pass into its ecosystem. Current providers of such option with password managers are 1Password and KeepassHub.