Client report that DNS name resolution is not working on network and also
report that AD replication between two domains controllers are failing. You are
requested to run some test & prove the AD replication & DNS name resolution are
A. Run DCDIAG /q command to check for error on domain controllers
B. Run repadmin command to that check AD replication between domain controllers
C. Use REPLMON tool to give report to customer on AD replication
D. Ping to the GUID of DC & make sure that GUID resolves to fully qualified domain
name of domain controller
E. Use NSLOOKUP to query A record of domain controller
F. Check hosts file and make sure domain controller host name are mapped to correct
I think it is d) reason others can detect issue however at the end the it is host file that causes the error. This not only gives solution, however detects the problem.
Microsoft Office 365 is a subscriptions based service which includes services like Exchange Online and Skype for business Online. These services integrate with Microsoft's online version of Active Directory called Azure Active Directory.
Sometimes it takes a new vantage point, apart from our everyday security practices, to truly see our Active Directory (AD) vulnerabilities. We get used to implementing the same techniques and checking the same areas for a breach. This pattern can re…