Exchange upgrade failed: Couldn’t open package UMLanguagePack.en-US.msi
This error indicates that the language pack you are trying to install is not compatible with your version of Windows. You can find out which languages are supported by looking at the list of languages on this page. Exchange 2016 CU20 is being upgraded to Exchange 2016 CU21. This is because, like all other systems, […]
Exchange upgrade failed: Couldn’t open package UMLanguagePack.en-US.msi Read More »