Unable to delete a an Organization Unit in Group Policy Management - Windows 2012 Server

I am trying to delete an organization group with the Group Policy Management MMC.
I Right Click, Select Delete, Informs me "Do you want to delete this organization Unit ? This will also delete all child object under this organization unit"  - I am a member of the DOmain admin group by the way.
I click on OK and I get  "Group Policy Management"  Access denied

My user is a member of Domain Admins so I should be fine I woudl have thought. Just tested by deleting a the container Group Policy assigned to Org Unit. That was allowed but not the container itself ?
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Peter HutchisonSenior Network Systems SpecialistCommented:
The OU may be protected from deletion by a tick box on the OU properties to prevent accidental deletion. Once that is un-ticked you can delete it.

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Will SzymkowskiSenior Solution ArchitectCommented:
As Peter stated that Accidential deletion is probably the most common reason here. However i would be checking the Permissions on this OU to make sure that Domain Admin do have permission (maybe the inheritance got removed).

If permissions are correct then most likely accidential deletion.

ccfcfcAuthor Commented:
I had to turn on "Advanced Features" then I was allowed to TURN OFF this setting.

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