I am looking into the same issue and found that I was able to set a custom MTU size on an interface via NETSH
Windows SHOULD accept the custom value but I have not been able to test this yet. If you still have your storage array in a lab I would be interested in your results. We had to put ours into production in a hurry.
This might get you started:
let’s look at the interfaces along with what the current MTU is on each: netsh interface ipv4 show interfaces Then, let’s make the mtu 1464 persistently using the Idx number of the interface to change from the above command in quotes: netsh interface ipv4 set subinterface "10" mtu=1464 store=persistent