Where is FsConfigWizard.exe on a fresh Windows Server 2012 R2 installation?

Having installed this service and realizing I'd configured the wizard incorrectly, I went to re-run it, and couldn't find it!

Doing some searching on Bingle, I found various references to C:\Program Files\Active Directory Federation Services 2.0 and C:\Windows\ADFS, but FsConfigWizard.exe was in neither location on my system.

Where is it?

It doesn't exist. You cant invoke the GUI installer again after the role is configured. You should use the powershell cmdlets to re-configure AD FS.

First server reinstall via install-adfsfarm with -overwriteconfiguration as per https://technet.microsoft.com/en-us/library/dn479416(v=wps.630).aspx

Additional nodes via add-adfsfarmnode with -overwriteconfiguration as per https://technet.microsoft.com/en-us/library/dn479385(v=wps.630).aspx

Both links have examples of usage for reference.