troubleshooting Question

Problem involving EventConfig_{oldsvrname} and AAD Connect.

Avatar of Online Computers
Online ComputersFlag for United States of America asked on
ExchangeMicrosoft 365DNS* AADConnect
5 Comments1 Solution122 ViewsLast Modified:
(I posted this at Reddit, but am still searching for an answer so I wanted to post here too. Hoping one of you might know what I'm facing and be able to help me get past the hurdle I'm encountering. Thanks. )

I've implemented AAD Connect in preparation for an O365 Hybrid migration project.

MSOL is sending me Identity Synchronization Error Reports every 30-minute cycle, complaining about an object with the Identity "EventConfig_xxx" (where xxx = an old server name).

The Error Description states "Unable to update this object because the following attributes associated with this object have values that may already be associated with another object in your local directory services: [ProxyAddresses SMTP:EventConfig_xxx@{organization};]. Correct or remove the duplicate values in your local directory. Please refer to for more information on identifying objects with duplicate attribute values."

How could I possibly have a duplicate address in local AD that uses ? There is nothing in the local domain with that domain name.

ADUC doesn't find an object with that name. I managed to find it myself, in Exchange System Objects, under the Events Root folder. There were 3 entries there with the same name. In ADSIEdit I found the objects, one with the name EventConfig_xxx. one with EventConfig_xxx-1, and one as EventConfig_xxx-2. The objects are of Object Type 'Public Folder'

The environment presently has Exchange 2010 servers, running SP3 UR26. Also one Exchange 2016 svr.

Nobody within the organization recognizes the server name at all or has any memory of it. Ping resolves it to an IP address. It doesn't respond to ping. I cannot find that IP address anywhere in DNS, whether looking in Forward or Reverse lookup zones.

I could not find the object in the O365 Admin Center, or the O365 EAC, or using O365 Remote Powershell (neither with Get-MSOLUser or Get-Mailbox).

I can find the object in a Metaverse Search using the AAD Connect Sync Mgr tool and the Source Anchor (provided in the Error Report). If I look at the Proxy Addresses on the object, none are the address AAD Connect is complaining about.

I cannot find the object in the Azure AD admin center.

IdFix doesn't detect the object.

I haven't found much online about this. I found a few pages that lead me to believe this is an orphaned remnant from either Exchange 5.5, 2000, or 2003. One article from 2007 ( suggested using a utility called 'events.exe' with a switch to clean up the infrastructure, but I'm not confident that will still apply, and I don't see any way to roll that back if it causes unanticipated problems.

The company does use Public Folders, so I can't break those.

Do any of you know what the Events Root\EventConfig_xxx objects do, how they are used, etc..., and how I can either clean them up or correct whatever is causing the AAD Connect complaint?

I've been trying to gather info on this and resolve it for a while now, so if I've left out any important and relevant information here, call me out on it - I probably just forgot to mention it.

Online Computers

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Join our community to see this answer!
Unlock 1 Answer and 5 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 5 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros