To copy the IAS configuration to another server
Open Command Prompt.

At the command prompt, type netsh aaaa show config >path\file.txt.
This stores configuration settings (including registry settings) in a text file. The path can be relative or absolute, or it can be a UNC path.

Copy the file you created to the destination computer.

At a command prompt on the destination computer, type netsh exec path\file.txt.
A message appears indicating whether the update was successful

http://support.microsoft.com/kb/930218

If the names of two domains collide, you can rename one of the domains. If the SIDs of the domains are duplicate, you have to remove one of the domains. Typically, this situation occurs when one of the following scenarios exists:

• One domain was cloned from the other domain.
• Before a computer became the first domain controller in either of the two domains, you clone this computer without using the SYSPREP tool.

Alternatively, you can migrate one of the domains to a new domain. However, you cannot migrate a domain to a new SID by using the sIDHistory property. Even if you successfully create a trust after you migrate one of the domain SIDs, you still have duplicate SIDs in user access tokens. Then, users who have duplicate SIDs can access resources that they should be unable to access.

http://support.microsoft.com/kb/324801

http://support.microsoft.com/kb/216498

server manager encountered an unexpected error while collecting data about the stutus of this computer
HRESULT:0x80070543

Problem:
The server-wide COM security settings have been changed to have a “Default Authentication Level” of ‘None.’

Solution:

1. Using elevated permissions, run Dcomcnfg.exe

2. In the “Component Services” window, navigate to ComponentServices->Computers->My Computer.

3. Right-click on “My Computer” and select [Properties] from the context menu.

4. In the “My Computer Properties” dialog, select the [Default Properties] tab.

5. Change the “Default Authentication Level” drop to ‘Connect’; if it is set to None.

7. Change the “Default Impersonation Level” to Identify; if it is set to something else.

8. Press the OK button in the “My Computer Properties” dialog.