There are over 90+ MS SQL Servers (SQL Server 2005, 2008 and 2012). All in the same Windows domain (but physically all over the world).
How to give a domain user (administrative, or other) access/permissions to its instances and databases without tweaking (creating, configuring) users/accounts and permissions for such user (or group) in each of 90+ servers, (and even more) their instances and databases?
Update (in respnce to @JonSeigel comment):
I have the list of MS Windows server-machines (domain names, ip-addresses) in domain without any access to either machines, SQL and App Servers in domain (supposedly, SQL and app Servers use default or common conventions names).
So, I should request the access in the form of exhaustive detailed description of the smallest privileges/permissions of what I need.
The usage of
BUILTIN\Administrators group provided such easy access to SQL Servers of earlier versions - 2005 and 2000. This would have been the most convenient for me. But it is not the case with MS SQL Servers 2008 and 2012.
I need to describe what I need with the smallest necessary privileges necessary for administering (monitoring, tuning, optimizing) MS SQL Servers + app servers that use MS SQL Servers (sometimes they are not even on the same machine).
Never been in such a situation before that I should describe what I need without even having read access to what I need