I have been using this process for a year or two now. Basically:
1. Download the msi installer from Flash Player distribution page
2. Create package in Microsoft SCCM for this msi installer
3. SCCM will install using the command: msiexec /i filename.msi /qn
Note: filename.msi is substituted for actual file name install_flash_player_11_active_x.msi
4. Push package to clients to upgrade flash.
This worked successfully when upgrading FP 10 to 126.96.36.199 for Internet Explorer 9 only.
Now the time has come to upgrade to 11.3.300.268.
Command: msiexec /i install_flash_player_11_active_x.msi /qn
If I run the MSI installer by itself with no commands, I only get the option to repair or remove FP. If I choose repair, it just repairs FP and does not upgrade.
If I run the command which effectively should install silently, it does nothing and FP remains at 188.8.131.52.
What am I doing wrong?
Could you post the flashinstall.log and msi log from one of these attempts?