we have trust relation between two domains but password sync is not working, After user changed password its not authenticating please any one can help on this

Hi Aditya Nelutla,

Thank you for posting in the Microsoft Community Forums.

there are several possible solutions:

1. Check Trust Relationship Settings: Ensure that your trust relationship is configured correctly. Sometimes, trust relationship settings may be incorrect, leading to password synchronization failures. Make sure your trust relationship is bidirectional and allows password synchronization.
2. Diagnose Synchronization Issues: For password synchronization issues, you need to diagnose the root cause of the problem. Check your password synchronization settings to ensure they are configured correctly and functioning properly. This may involve reviewing event logs or using specific tools for diagnosis.
3. Manually Synchronize Passwords: If the password synchronization mechanism is not working properly, you can try manually synchronizing users' passwords. This can be done by resetting the user's password in the target domain. Resetting the password to the same password as in the source domain when the user changes their password in the source domain can resolve the issue.
4. Password Hash Synchronization: Consider implementing password hash synchronization mechanism. This approach ensures that users' password hashes are synchronized between the two domains rather than plain-text passwords. This way, users can still authenticate with the same password in both domains even if the password policies differ.
5. Consider a Single Domain Solution: If password synchronization issues persist and cannot be resolved, it may be necessary to consider merging the two domains into a single domain. This would eliminate password synchronization issues and simplify management and maintenance.

Best regards

Neuvi Jiang