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After upgrade to Configuration Manager 2211, MicrosoftPolicyPlatformSetup.msi won't install
After upgrading to Configuration Manager 2211, manual client installations invoked from <servername>\c$\Microsoft Configuration Manager\Client\CCMSetup.exe fail at the point of installing the Microso...
SuperMJT I haven’t seen this issue yet. However, you can try capturing the verbose log by using /l*v during manual installation and look for value 3 in the msi log. That should give you the reason for the fatal error code 1603.