Unable to Install Rollup Update – Update Rollup for Exchange Server 2010 Service Pack 3 Could not be installed. Error code 1603

Unable to Install Update Rollup – Exchange 2010

Solution:

Open elevated Command Prompt (Run as Administrator)

Navigate to the RU Installer path

Run the below command: 

msiexec /update Exchange2010-KB4509410-x64-en.msp