Delete user form active directory does not work

I want to delete a user from Active directory and get the following. This user has migrated from SBS 2010 to Windows 2012 DC. I have no problems deleting users that were setup on the DC server. The DC is linked to Office 365 and I need to delete a few of the accounts from both the server and Office 365
When I try to delete the option from ADSI I get
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Adam BrownConnect With a Mentor Sr Solutions ArchitectCommented:
Open the Properties for the user, go to the Object tab (You may need to enabled advanced features view). Make sure there isn't a checkmark next to the "Protect from deletion" option. If that is not enabled, enable the advanced features view and select the security tab in the User's Account properties and make sure it isn't set to deny delete and that domain admins (or your account) has permission to delete the object.
GerhardpetAuthor Commented:
"Protect object from accidental deletion" is unchecked. I had to first enable advanced features

Under security, I added the admin username and selected all checkboxes to allow and still get the same message when trying to delete.

At first, I also tried without adding the admin user to security. Could not delete either
Adam BrownConnect With a Mentor Sr Solutions ArchitectCommented:
Check each of the existing entries there for Special Deny entries. You'll need to click the Advanced button on the security tab to view the Advanced ACL. Check each entry in the Advanced ACL viewer to make sure there are no "Deny" settings for Delete.
GerhardpetAuthor Commented:
Ok, all I did is restore to default under the Advanced tab and I was able to delete the user.

Thank you for your help!
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