I have a number of user who are not updated with the latest DAT eventhough some of the machines in the same site are updated. The configuration and setting are the same as they inherit from central epo server.
I've check on
ping result - maching resolving to the right repository
sitelist.xml file is correct
futher finding found that the DAT files are indeed corrupted. deleted the whole commonupdater folder, and downloaded fresh update folder.
problem caused by the ePO updates on dat version 5162 as it stuck on the version and cant be update.