While Sandra is correct that Sage Intelligence itself may be compatible with Excel 2019, Sage Intelligence (SI) version 7.50 is the latest version supported with Sage 100.  SI 7.50 has not been tested for Excel 2019 compatibility so is not fully supported and no changes will be made on that version to accommodate Excel 2019.  Please refer to the Integrated Solutions Compatibility Matrix (ISCM) for Sage 100 versions 2017, 2018, 2019 on KB 48274.  There have been discussions around SI Maintenance release for Sage 100 compatibility in 2020, but has not yet been approved.   

While Sandra is correct that Sage Intelligence itself may be compatible with Excel 2019, Sage Intelligence (SI) version 7.50 is the latest version supported with Sage 100.  SI 7.50 has not been tested for Excel 2019 compatibility so is not fully supported and no changes will be made on that version to accommodate Excel 2019.  Please refer to the Integrated Solutions Compatibility Matrix (ISCM) for Sage 100 versions 2017, 2018, 2019 on KB 48274.  There have been discussions around SI Maintenance release for Sage 100 compatibility in 2020, but has not yet been approved.