Joining RHEVM-Manage-Domain tool to join AD Domain

Do note that for Red Hat Enterprise Virtualization you must attach a directory server to the Manager using the Domain Management Tool, engine-manage-domains. This configuration sis for RHEV 3.5
Active Directory
Identity Management (IdM)
Red Hat Directory Server 9 (RHDS 9)
OpenLDAP

# rhevm-manage-domains add --domain=your_active_directory_domain --user=spmstest --provider=ad

Restart the ovirt-engine

# service ovirt-engine restart

Virtual Machine 3D Support Option is Greyed Out for Windows 2008 and 2012 on VMware

The solution is taken from Enable 3D Support option is greyed out in virtual machine video card settings (2092210) 

Modify the VMX file of the Virtual Machine

1. Take backup of the virtual machines VMX file
2. Open the VMX file, using text editor and add this line in the end

mks.enable3d = TRUE

*You can use the vi to edit the VMX file

3. Check the VMID of the Guest OS you are reloading

# vim-cmd "vmsvc/getallvms"
Vmid        Name .........
2

4.  Reload the virtual machines configuration file by running this command:

# vim-cmd vmsvc/reload VMID