You need to know the master roles in active directory
Open Domain Users and Computers and click with the right mouse button on the domain than select Master Roles. You will get a windows with tree tabs. One for the RID Role, one for PDC emulator Role and one for the Infrastructure Role. You can find the servernames for the respective role.
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About the Author
Author: Wim Peeters - Keskon GmbH & Co. KG
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience, including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform.