The local computer is already running Exchange Server_ExchangeAlreadyInstalled
Applies to: Exchange Server 2013
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Microsoft® Exchange Server 2007 setup can't continue because the local computer has previous Microsoft Exchange components installed.
Exchange 2007 setup requires that the local computer not have existing Microsoft Exchange components installed.
To resolve this issue, remove any Microsoft Exchange 2000 Server or Microsoft Exchange Server 2003 components, and then rerun Microsoft Exchange setup.
To remove Microsoft Exchange components
Select Start, point to Settings, and then select Control Panel.
Double-click Add or Remove Programs.
In the Currently installed programs list, select Microsoft Exchange, and then select Change/Remove.
In Microsoft Exchange Installation Wizard, select Next.
In the Action list on the Component Selection page, select the down arrow next to each component that has been installed, and then select Remove.
Note
Installed components have a check mark in the Action list. When you click Remove, the check mark is replaced by the word Remove.
Select Next two times.
Select Finish.