Consult your Microsoft documentation on checking your version and how to update. Older versions of Windows Server might work, but check whether you need to update the XML services to Core XML Services 6 level. To install and run GWMHN, you need Microsoft Windows Server 2012 R2 or later. The GWMHN app is added to the Google Admin console allowlist as a third-party app under App Access Control.A Google Workspace service account to authenticate the HCL Domino server.A super administrator account for your Google Admin console (for example, to provision users and resources and to activate profiles).
Note: Google does not provide technical support for setting up mail servers, databases, or other third-party products. A thorough understanding of HCL Notes administration is required. This article is intended for administrators who are responsible for the installation and management of GWMHN. To let your users share availability information between Google Calendar and Notes, you can also check out Connecting Calendar & Notes with GCCHN.