Hello,
I need to delete server manager,and powershell icon from RDS server 2012r2 for all users via GPO. 
AD is also 2012R2 .
please dont give links to 2008R2 articles.

Have you tried that: http://www.emware.nl/articles/remove-unpin-server-manager-icon-from-taskba.html

Yes i have tried. Thera is no such path on 2012R2.

Have you tried this one?

http://www.it.ltsoy.com/windows/lock-down-remote-desktop-services-server-2012/

Hi,

I also tried to use the "File System" policy and it seems not work either.

According to research, Pinned items are stored in registry:

HKEY_CURRENT_USER > Software > Microsoft > Windows > CurrentVersion > Explorer > Taskband

It is cryptic so we cannot directly edit it. The following blog provided a way to export a key to XML and import to GPP so that you can customize users' desktop. 

https://4sysops.com/archives/convert-reg-to-xml-to-import-registry-key-into-group-policy-preferences/

Please Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

To do this you need to first find a client to create a template - delete these pinned icons, export registry key, convert to XML and import to GPP. Then all users will have a same desktop. You can set that GPP to "run once" or users will not able to customize their desktop forever.

Another workaround is to remove everything (pinned icons) from taskbar. This is not a good solution as users will not able to pin icons once it is applied. Just for reference.

How to manage Windows Taskbar Items pinning using Group Policy

http://social.technet.microsoft.com/wiki/contents/articles/28239.how-to-manage-windows-taskbar-items-pinning-using-group-policy.aspx

Marius i will try this today and tell you result.
Thanks.