N2048 - Allowing one VLAN to access all other VLAN's

I am a bit familiar with general networking configurations but this seems a bit out of my scope, but I'm hoping its an easy fix.  

We use N2048's and have several VLAN's set up for different departments, IT, HR, etc., about 10 altogether.  Ideally, we would like the IT VLAN to have access to our entire network, while keeping the other VLAN's restricted to their respective subnets.   

This came up recently when an outside party needed access to our network for testing, we were under the impression that he would have unrestricted access while using an on-prem device on the IT VLAN, he informed us that he does not have the access he needs.

As previously stated, we are using N2048's and the OpenManage Switch Admin.  Thanks for any and all help.