Copyright of icons is as followes: datacenter.png, lamp.png, factory.png, datacenterred.png, lampred.png, factoryred.png, Taken from MS Word According to https://support.microsoft.com/en-us/office/insert-icons-in-microsoft-office-e2459f17-3996-4795-996e-b9a13486fa79 (date: October 9th, 2019) "These icons are free to use; there's no royalty or copyright."