Warning - validation error

Hello,

For a while now I have been getting a warning every time I open a distribution group or mail-enabled security group in the on-prem admin center.

"The object removed has been corrupted or isn't compatible with Microsoft support requirements, and it's in an inconsistent state. The following validation errors happened:
The access control entry defines the ObjectType 'a8df73ef-c5ea-11d1-bbcb-0080c76670c0' that can't be resolved.."

As far as I can figure 'a8df73ef-c5ea-11d1-bbcb-0080c76670c0' referrs to the 'Employee Number' LDAP attribute, which a group object does not have?
It doesn't appear to cause any issues, but I would still like to fix the problem.

Anyone got any ideas to what might be causing this error? We are running Exchange 2016 CU16 in a hybrid environment.

Exchange Server

hybrid

15 Replies

ChristianBergstrom
Silver Contributor
Sep 07, 2020
Gly Hi, see if this can help https://www.admin-enclave.com/en/articles/exchange/253-resolved-how-to-fix-damaged-or-corrupt-health-mailbox-on-exchange-2016.html
- Gly
  Copper Contributor
  Sep 07, 2020
  ChristianBergstrom
  Thank you for the suggestion.
  I ran "Get-Mailbox -monitoring" but found no errors there.
  - ChristianBergstrom
    Silver Contributor
    Sep 07, 2020
    Gly Hey, try this then 🙂
    
    https://social.technet.microsoft.com/Forums/en-US/213afa53-0b61-4dd6-a807-a0262aa16474/the-access-control-entry-defines-the-objecttype-9b026da60d3c465c8bee5199d7165cba-that?forum=Exch2016Adm
    
    What I want to highlight is this.
    
    1. Run the IISReset on all Exchange server.
    2. If reset IIS does work, reboot all Exchange server and check the result.

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Warning - validation error

15 Replies

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