Difference between Domain Browse List and Domain Membership

Domain Browse List and Domain Membership
You can choose to discover all computers currently sharing files or printers running the Messenger service (Domain Browse List), and/or all computers that have trust accounts in the domain (Domain Membership).
The available discovery methods are Domain Browse List and Domain Membership. These settings are used for asynchronous (click Discover Now) and scheduled discovery. Select at least one method.
Domain Browse List —This option discovers all computers (including Windows 95, 98, 98 SE and ME computers) that are sharing files or printers or are running the Messenger service.
Domain Membership —This option discovers all computers with trust accounts in the domain. This finds all Windows NT/2000/XP/2003 computers in the domain. However, it will not find any Windows 95, 98, 98 SE and ME computers.
Note: This method is substantially slower than the Domain Browse List method and will not identify the computer’s operating system.
Domain Browse List
The Domain Browse List works by enumerating the records in the computer browse list. This computer browse list was designed for a small, peer-to-peer environment, so it does not scale to large environments well.
When the Notification Server performs a Domain Browse List discovery, it requests a copy of the computer browse list, which includes additional information such as the computer’s operating system and version. It then does a reverse lookup of the computer’s name to get its IP address.
You might have problems discovering computers using this method if:
The computer is not in the computer browse list.
The computer is in the computer browse list but not registered as sharing files.
It can take between 15 and 51 minutes for changes to be reflected in the computer browse list.
Note: The Domain Browse List discovery method gets as much of the computer browse list as it can as fast as it can. This can overload a PDC in a large domain or a multi-domain environment. We recommend you run this outside business hours, preferably over a weekend.
Domain Membership
This works by enumerating the computer accounts in the specified domains.
When you add a Windows NT/2000/XP/2003 computer to a domain, a computer account is created in that domain. This computer account is used by the computer to authenticate with the domain so the computer can authenticate user logons using a secure connection. Windows 9x computers do not create a computer account, which is why you cannot find Windows 9x computers using this method.
When discovering computers using the Domain Membership method, Notification Server catalogs these accounts. Unlike the Domain Browse List method, these accounts have no additional information beyond the computer’s name. Notification Server still does a reverse lookup on the name to get its IP address.
If problems occur using this discovery method, check that accounts exist for these computers using Server Manager (Windows NT 4.0) or Active Directory Users and Computers (Windows 2000 and later).
Both of these methods write errors to the Notification Server log file. If you ever have a problem regarding Resource Discovery, check these log files for information.