With this certificate issue that I mentioned, a reinstall of the client is required. Let me know if that is the case on your systems and I can go into a little more detail.
http://technet.microsoft.com/en-us/library/cc178995(v=office.15).aspx#TestVerifyMSP
Follow these instructions to add the updates to your Office deployment package. They will install during the Office install as opposed to when the clients check into the system.
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