Sage 300

I am getting a very generic error in Data Integrity Administrative Services in Sage 300 ERP 2016. It simply reads "E: Invalid Windows user." I do not know when this error occurred but would like to get it resolved so my Data Integrity checks are clean…

Good day could you provide me with suggestions, modules or tweaks that can prevent specific users from accessing or seeing certain inventory items?

Is there a way to determine which Invoices are listed as OE Pending from a database level whether it be looking at the OEINVH or some other table as I am trying to build a Crystal Report based off these Pending Invoices.