Remove initial configuration wizard on Windows Server 2008 using GPO

Open GPO management console using administrative privilege. Create and link a GPO with Enterprise Server OU. Right Click on Enterprise Server OU> Click on Property

Expand and locate Server Manager section in the following section of GPO. Expand Computer Configuration>Expand Policies>Expand Administrative Templates>Expand Systems>Select Server Manager.

Enable both the options as shown on screenshots.

Close the window. Run gpupdate on servers to apply GPO or wait for GPO to refresh at configured GP refresh time.