[Solved] Another Version of Exchange Server is already installed in Windows Server 2016

Last Updated on December 12, 2017 by admin

When you try installing a new version of Microsoft Exchange Server and you have another version already installed or you were failed in installing any version of Exchange Server. You may get the following error:

"Another version of this product is already installed. Installation of this version cannot continue. To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel".

The Solution

Press windows key and R to Open Run.

Type regedit and then hit enter key

Go to following location


Rename Exchange key to _Exchange and then run the setup again.









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