[Samba 4] FSMO roles change research

[tridge at samba.org]

Hi Nadya,

 > I have done some research on how FSMO Roles changes works in AD in
 > order to implement commands that invoke role change, as a means for
 > testing Samba 4

thanks!

 > Python tool to perform these operations to be done shortly.

great, thank you!

I think we should also have commands something like "net domain role
list" to show which DC has each role. 

We also need to be pretty careful about access control for these
operations :-)

Cheers, Tridge