Office 2019 Professional Plus CD key is a Global Key,for 1 PC but do NOT support MAC system.It is Permanent and Authorized.Office 2019 update conditions: 1. There have just one Office software in the computer（Clean up the old office before activation）；2.Activated and installed office from setup.office.com instead of other place.
Product minimum requirements system: 32/64 bit Windows 10.
OEM EDITIONS ARE BOUND TO YOUR MOTHERBOARD (PC). IN CASE OF MOTHERBOARD REPLACEMENT, YOU CAN CALL MICROSOFT SUPPORT TO HAVE YOUR OEM KEY TRANSFERED TO YOUR NEW MOTHERBOARD (PC).
The essentials to get it all done. Office Professional 2019 is for growing small businesses who want the classic Office apps plus Outlook, OneDrive, Publisher and Access1. A one-time purchase installed on 1 PC for use at work