Contact Groups created from Outlook contacts get added with /o=ExchangeLabs

Last Updated: September 5, 2025

ISSUE

When you create a Contact Group and add members from your Outlook contacts folder, the contacts appear in the group dialog box with an Exchange LegacyDN.

The Email column will show: /o=ExchangeLabs/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=7a46a2941e094e23bf490eae3fe99523-xxxxxxxx-xx

contact group exchange issue

This problem happens with Outlook contacts that were added from the Global Address List. For example, on an email when you right click a recipient’s email address and select Add to Outlook contacts, this saves from the Global Address List. For contacts added to the Outlook contacts folder from the Global Address List, PeopleGraph modifies the contact's Email1OriginalEntryID which breaks the property and causes the issue.

If you try to send an email to a Contact Group with this issue you might get the error below:

“An internal support function returned an error.”

Example error contact group exchange

STATUS: WORKAROUND

The service team created a fix, and it has just started rolling out to the internal rings. We will update this topic when the fix gets to production.

To work around the issue, add members to the Contact Group from the Global Address List directly. You can add from the Offline Global Address list or the Global Address List (example below). Do not add the contacts from your local Contacts folder because those contacts have the bad property.

Offline global address list example