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When I see that its sometimes because a member of that group is not in scope to be synced to Entra.
Groups are showing Dn-attribute-failure error
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vinay talla
0
Reputation points
Microsoft entra connect shows dn-attribute-failure error message while syncing to azure
Microsoft Security | Microsoft Entra | Microsoft Entra ID
2 answers
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Andy David - MVP 157.5K Reputation points MVP Volunteer Moderator2025-03-12T20:14:50.87+00:00 -
vinay talla 0 Reputation points
2025-03-12T20:17:59.9166667+00:00 How to identify it
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Andy David - MVP 157.5K Reputation points MVP Volunteer Moderator
2025-03-12T20:23:50.6066667+00:00 Do you have have some OUs or users excluded from the sync?
If so, check the membership of the on-prem group showing that error and see if any members are in those OUs or prevented from syncing
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Venkata Jagadeep 1,400 Reputation points Microsoft External Staff Moderator2025-03-17T18:57:09.13+00:00 Hello vinay talla,
The error Dn-Attribute-failure on AD Security Groups usually occurs when there are users with duplicate attribute values in the on-premises domain and are part of the group being sync'd to Azure AD.
For example, you can have the same SMTP/Proxy address configured for 2 users in local AD, but when you sync those users to Azure AD, you will encounter a Dn-Attribute-failure error for all the AD Security Group user is part of.
To resolve this error, you need to correct the duplicate attributes in your on-premises AD all the users who are part of the affected group. After making the changes in your local AD, run Start-ADSyncSyncCycle -PolicyType Initial to run a full sync cycle.
Note: You can try changing duplicate attributes for a very small set of users and confirm that you no longer get the Dn-Attribute-failure error for those users before making these changes for all the affected users.
Ref :
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Venkata Jagadeep 1,400 Reputation points Microsoft External Staff Moderator
2025-03-18T17:58:17.5766667+00:00 Hello vinay talla,
Hope you are reviewed my above comment. Please let us know if it is helpful, so that the community will be aware of this resolution as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
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vinay talla 0 Reputation points
2025-03-28T09:13:07.8166667+00:00 After performing full sync issue was resolved
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Venkata Jagadeep 1,400 Reputation points Microsoft External Staff Moderator
2025-03-28T18:56:02.4733333+00:00 Hello vinay talla
Thank you for updating.
When groups are showing Dn-attribute-failure error while syncing to cloud.
You have removed any duplicate entries and ran full sync cycle, issue was resolved.
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Josh Villagomez 160 Reputation points Microsoft Employee2025-03-18T18:29:17.37+00:00 Which Entra Connect version are you using? How long has the error occurred? These errors are a little tricky. Normally, it means there's a member with an invalid distinguished name (DN). For example, an invalid character as part of the DN can trigger this exception.
What you can try doing is performing a preview of the security group, and search for the members that are getting added or modified. You may find the culprit. If it's an invalid attribute, you will of course need to fix it in AD and allow delta to pick it up again.
If it happened within the last seven days, you can review your run profile history for changes on the inbound AD flow. The error is clear - you have a scoped member with an invalid DN.-
Venkata Jagadeep 1,400 Reputation points Microsoft External Staff Moderator
2025-03-20T18:34:38.6333333+00:00 Hello vinay talla,
Did you get a chance to review the comment posted by Josh Villagomez to check any invalid Distinguished Name (DN) attribute and need to fix in AD itself. And if in case if you have any resolution please do share that same with the community as it can be helpful to others. Otherwise, will respond with more details and we will try to help.
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Venkata Jagadeep 1,400 Reputation points Microsoft External Staff Moderator
2025-03-21T23:37:20.13+00:00 Hello vinay talla,
Following up to see if the above answer was helpful. If this answers your query, do click
Accept AnswerandYesfor was this answer helpful. And, if you have any further query do let us know.
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