Status: Resolution Ongoing
The issue is currently being investigated and we have a ticket raised with Microsoft support who have their engineers investigating the issue.
An issue has been identified by the AMS IT Department where staff are seeing user names appearing incorrectly or reverting to previous position holder names.
You search for a staff member using Outlook, Teams, SharePoint and the user's email address appears correctly but the name of the user is for someone who may have held that position previously.
Here is the current workaround: