Try removing the group from the site collection and then add it again. You can do it from the UI looking into the group and performing the deletion.
Refresh Updated Security Group Name in SharePoint Online Sites
Hi MS Q&A,
Seeking advice and recommendation if it is possible to via PowerShell to manually refresh a renamed Security Group name reflected against SharePoint Online Sites or it will automatically reflect updated name over time?
Example:
Security Group A had been granted permission to a SharePoint Online site.
Security Group A has been renamed via AAD to Security Group B.
SharePoint Online site still shows Security Group A and does not refresh to display updated name.
People Picker shows updated Security Group name subsequently after rename, however re-adding the same Security Group will still show up with the old name.
The displayed name was only able to update once purging the Security Group from the All People listing (.../_layouts/15/people.aspx?MembershipGroupId=0), however this is not preferred in cases where the Security Group might be explicitly associated on multiple subsites / items and attracts increased overheads to track and re-apply explicit permissions.
Appreciate any advice or information.
Thank you.