can add "Administrators" to another group only by command line - why not manually?

[orbs]

ok, here's me probably missing the obvious again... it may be the late hour, but this is something i just don't get:

i create a new local group. i want to make the local "Administrators" group a member of that new group.

i cannot do that manually, as the "Administrators" group does not appear in the list of users and groups that i can add to the new group.

however, this command line works:

net localgroup "MyNewGroup" "Administrators" /add

not that i mind doing it via command line :-) but why can't i do this manually?

[BrewManNH]

How are you trying to do it manually, and what OS are you using?

[JLogan3o13]

It is a feature. Even if you do it from command line, the functionality is not there:

https://technet.microsoft.com/en-us/library/ee681621(v=ws.10).aspx

[orbs]

thanks @JLogan3o13, i realized that when i noticed that even when the command line succeeded, the permission were not actually propagated. now thanks to your link i know it is so by design.

as a "solution", i changed the process to list the local users in the group so i then join the users instead of the group itself, with a proper notification.

@BrewManNH, i did not mention the OS as i tried it on several (2008 & 7 in a domain, and a standalone XP). all produced same results.