Accessing network Office 365(excel, Word etc.) documents with WIP enabled on Hybrid Azure AD joined

I have configure a test domain in Hybrid Azure AD mode, all SharePoint access to Office files it fine and they all display the briefcase.

I have added our local AD server IP and our local domain to the WIP network boundaries.

When I try to access any office file on the network share, I receive an error of “you cannot open \\filerserver\file.xlsx”, but I can open a notepad file from the same network share.

I can create/edit/delete notepad files from the network location.

How do I set WIP to open the file from my local domain on server1(192.168.16.10)?

Thanks,

AxiomAU.