The licence of all Microsoft product has to be safed on the individual computer. Other you loose time everytime you open up a document. And
Loosing time goes further, if the local wifi connection is missing. Ask yourself how many time a year the wifi is not working. And in that case you need even more time to upen up microsoft products. So please safe all licence on the individual computer. It could still be very fied once in a while. With best.