UCMA 4.0, Core Runtime not installed [UcmaRedistMsi]
Microsoft Exchange Server 2016 Setup can't continue because the local computer requires a software update. You'll need to install this update before Exchange 2016 Setup can continue.
Exchange 2016 Setup requires that the Unified Communications Managed API 4.0 Runtime update be installed on the computer before installation can continue.
Download and install the 64-bit update from the following URL, and then click retry on the Readiness Checks page.
If this update requires a reboot to complete installation, you'll need to exit Exchange 2016 Setup, reboot, and then start Setup again.
Did you find what you're looking for? Please take a minute to send us feedback about the information you were hoping to find.