After migrating to Windows Server 2012 you can notice some specific challenges when maintaining files and folders. Suddenly you don’t seem to have access anymore even if your account has been granted ownership.
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In Windows Server 2008 R2 this already was sort of a challenge but could be avoided by starting Windows Explorer as administrator.  However in server 2012 this option has gone for Windows Explorer.

How to resolve this?  

You can try to disable User Access Control (UAC) but the powers that be at Microsoft decided that even if you have disabled UAC, it still is enabled for Windows Explorer.

Regedit to the rescue!  
If you add the following key and reboot the server, you can maintain all files and folders again:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
Key: EnableLUA
Type: REG_DWORD
Value: 0

 

This setting can be deployed to all your file servers by using a group policy preference:

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