Morning All, I am facing on-going challenges with patching Exchange Server 2013, in several instances I have been unable to install CU23 and then the Security Update due to the C:\Windows\Installer Folder having been cleared out. At present the issue I have is not being able to download CU8, CU10. and CU13 as Microsoft no longer seem to offer a link to download them. Unfortunately I require these to have come from a verified source i.e. the manufacture "Microsoft" I cannot download them from just any site. Does Microsoft have a source that they can confirm is safe where I can get these from please. Thanks Chris