Failed to initiate install of WSUS updates, error = 0x800b0109

SCUP 2011 is integrated with SCCM 2012 R2. SCCM deploy the Adobe Reader X! updates but failed with error 0x800b0109. First thing I checked is whether the WSUS certificate is installed in the Trusted Root Certification Authorities and Trusted Publishers of Local Computer. Yes, the WSUS certificate is installed!!

Browsing the internet and saw there is a requirement to set GPO to enable the setting below:
"Administration Templates -> Windows Components -> Windows Update -> 'Allow Signed updates from an intranet Microsoft update service location'

After I enabled the settings, the Adobe Reader updates installed successfully.

Configuration Manager Client Upgrade Package Distribution Failed

Whenever you setup a new distribution point, the system will automatically distribute 2 packages to the distribution point.
1. Configuration Manager Client Package
2. Configuration Manager Client Upgrade Package

But somehow the Configuration Manager Client Upgrade Package failed to distribute to the distribution point. The upgrade package is hidden, hence unable to redistribute the upgrade package like normal package. Therefore, we have to trick the system to redistribute the packages.

Trick:
1. Open an empty notepad and save it as client.acu

2. Copy the client.acu to the inboxes\hman.box folder at the top-level site
3. Monitor the hman.log to check whether the Client Upgrade package gets updated