I need to set up a plan for organizing permissions for sysadmins in a 200-server Windows 2003/2008 network. The servers exist in 5 separate forests that are connected via 2-way trusts.
At the moment, I'm mostly focused on how best to organize the groups. All sysadmins have a single admin account in one of the forests (forest A) and I wish for them to use this account to manage everything.
As I understand it, the usual best practice is to:
Give access to resources to domain local groups in the local forest where they exist. I've done this by creating groups like ForestB\MemberServerAdmins, ForestB\DCDNSAdmins, ForestC\ExchangeReadOnlyAdmins, etc and I've delegated access to these groups from the various applications.
Organize users by role into global groups in forest A and then place those global groups into the domain local groups as necessary. I guess this might be done, for instance, by department where you have a group like ForestA\Operations and they get access to some but not all of the resource groups and another group like ForestA\Admins and they get access to all of the resources groups. That's just an example.
The problem is, we really need to assign these permissions to resources on an individual basis. We're a smaller company and I don't have batches of users that necessarily need all of the same permissions. This makes step #2 above seem not to work for us. The solution I'm left with is to create global groups in ForestA that have basically the same names as the various resource groups like this:
ForestA\ForestB MemberServer Admins
and then place individual admin accounts into those groups.
I get the flexibility this two-group solution has for assigning resources but does it make sense to set things up this way? I like it because then I can manage all permissions in ForestA and easily look at any admin account to see which groups they are in to determine what they have access to. Still, I'm not sure this is the best route?