I had a quick look at this, couldn't find the same version but the same issue seems to happen with version 7.9.2107.0
There is a custom action that fails to return a successful exit code when the install runs under the system account.
CustomAction SetInstallCookie returned actual error code 1603 (note this may not be 100% accurate if translation happened inside sandbox)
When not run under the system account.
MSI (s) (58:70) [19:20:36:808]: Note: 1: 2235 2: 3: ExtendedType 4: SELECT `Action`,`Type`,`Source`,`Target`, NULL, `ExtendedType` FROM `CustomAction` WHERE `Action` = 'SetInstallCookie'
MSI (s) (58:14) [19:20:36:808]: Invoking remote custom action. DLL: C:\Windows\Installer\MSI9419.tmp, Entrypoint: SetInstallCookie
Action ended 19:20:36: SetInstallCookie. Return value 1.
https://social.technet.microsoft.com/Forums/ie/en-US/e59de0d3-6e54-43b1-9f10-de7eb4f6abe8/live-meeting-2007-install-fails?forum=olmdiscussion
3073 = makes no difference, you could set the custom action not to check the exit code with ORCA but I would raise it with the Vendor.
Your not doing anything wrong in SCCM.