You may wish to change the IP address of the MFP, please be aware doing so may effect printing.
You'll need to remote into the MFP's webpage, you'll need the current machines IP address to do so.
Next click on Network Settings, it will ask for the admin password which is admin.
Next you will see the current IP address information, go ahead and change the IP address to one your IT provider has given you.
The machine will require a reboot and after you are done.
Caution this is a destructive change and doing so you risk users not being able to print, You may wish to instead place a service call for this on 01892 664999