Unexpected Display Name Changes in Outlook Contact Cards After NetIQ IAM Upgrade Integrated with AD

Description of Issue: After performing an upgrade on our NetIQ Identity and Access Management system, which is integrated with our Active Directory, we've encountered an issue in Outlook/Exchange:

• When right-clicking a recipient in the 'To' field and selecting "Open Contact Card", the contact card initially displays correctly. However, after fully loading, the display name changes to an unexpected format: "[username] managed by [owner]".

Background Information:

• NetIQ's Role: NetIQ manages our IAM and synchronizes user information with Active Directory.
• Service Account Configuration:
  • First Name: Set to the service account's username/user ID.
  • Last Name: Set to "Managed by [owner name]".
  • Email Address: Both the service account and the owner share the same email address.
• Recent Changes: Completed a full upgrade of NetIQ components (IDM, IG, SSPR, Reporting, RemoteLoader, Designer) last week.

Troubleshooting Steps Taken:

• Cleared Outlook cache.
• Redownloaded the address book.
• Verified configurations in Active Directory.

Request for Assistance:

• Has anyone experienced similar issues where display names in Outlook are affected by changes in Active Directory attributes?
• Could this be related to how Outlook/Exchange interprets certain AD attributes post-update?
• Are there recommended steps to troubleshoot or resolve display name discrepancies caused by backend IAM system updates?