So in my environment i have two Primary Sites with a CAS. I have PMM installed on each Primary Site. How does PSUS work with a CAS? I have done the steps at the end up the certificate setup: The following steps should be done on both WSUS and SCCM SMS Provider servers (considering that WSUS and SCCM SMS Provider are running on different servers): click Win+R combination to open Run dialog, enter mmc to open MMC Console. click File > Add/Remove Snap-in.... in the left pane of Add or Remove Snap-ins window select Certificates and click Add > button. in the Certificates snap-in window select Local computer account > Finish > OK. in the Certificates snap-in select Trusted Root Certification Authorities > right-click Certificates > All Tasks > Import and import the certificate you just exported. in the Certificates snap-in select Trusted Publishers > right-click Certificates > All Tasks > Import and import the same certificate. And all of this is setup correctly. When I go to products and classifications to select Apple updates, i have to do that on the CAS. The documentation only says to do it on the Primary. Because of this, there is no Apple updates available to be selected on the CAS. Do i also have to do the certificate work on the CAS along with the Primary sites? There is no documentation on how to get this to function when a CAS is in the environment.