Attribute list extension in Azure AD connector target system schema?

Hello,

I am working on reading groups from Azure AD using the Synchronization Editor Azure AD connector, on version 9.2.1.

I need to be able to read all fields related to a Azure Group, such as the onPremisesSamAccountName, but it doesn't exist on the target system schema attributes list.

Would it be possible to extend the list of target system attributes in target system schema?

Thanks!