“Exchange Database iDataAgent” option grayed out with CommVault Simpana 9.0 R2 installer on Exchange Server 2013

Problem

You attempt to install the Exchange Database iDataAgent with the CommVault Simpana 9.0 R2 installer on Exchange Server 2013 but notice that the option grayed out:

Hovering over the option displays the following message:

Provides backup and recovery of Microsoft Exchange databases.

This platform is disabled because:

It requires a supported version of Microsoft Exchange.

Solution

As per the CommVault SP3 notes:

http://documentation.commvault.com/hds/release_9_0_0/books_online_1/english_us/service_pack/win32/sp9/list_of_updates.htm

… to add support for Exchange Server 2013, you will need to create the following registry key:

[HKEY_LOCAL_MACHINE\SOFTWARE\GalaxyInstallerFlags]

"bEmulateThirdPartyApps"=dword:00000001

Note that I had to create the GalaxyInstallerFlags key as it did not exist.  Once the key and dword is created, restart the installer and you should see the Exchange Database iDataAgent available: