Windows Server 2008/6.0.6001.16497.longhorn beta3.070330-1720
From BetaArchive Wiki
Windows "Longhorn" Server April CTP was released in Microsoft Connect on April 4, 2007.
It was the last CTP release before Beta 3.
Changes
The setup background was changed into the gray one from previous builds and the login screen appeared to be having a solid-color background.
