You need to look at the file replication services of the DCs of your domain
Firewall restrictions can be the cause of replication problems
The file replication services are responsible for synchronising the sysvol and netlogon shares. You can use the free microsoft tool sonar to troubleshoot FRS. You need to download and install the tool first. You can start it from a command line by typing sonar. It has a graphical user interface which is easy to understand.
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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.