Posted: Thu 14 May 2026, 1:22pm.
We are aware of a current issue preventing users viewing and managing the membership of distribution groups that they own.
We have identified the cause and deployed a solution which may take up to 24 hours to take effect across all email clients.
Please note that the ownership, membership, and permissions on existing Distribution Groups have not changed so you can still safely send to groups as normal, until the current issue is resolved.
If you have an urgent need to view and update the memberships of a group, please raise a request at https://sussex.saasiteu.com/ and we can update on your behalf.
We will post an update once resolved.
UPDATE: 18 May 2026 - 12:21pm
We deployed a successful fix last week, however, given the number of mailboxes and groups in our directory, this is taking some time to propagate to all users.
You may now have visibility of some groups you own or are a member of, but it may take a few more days for all groups to appear.
In the meantime, you can still send emails to distribution groups as normal.
Thank you for your patience.
Following further fixes and propagation, we are confident this issue has now been resolved.
Users can once again view the Groups I Own tab and manage their mailing lists via:
https://admin.cloud.microsoft/exchange?page=groups#/
Thank you for your patience while we worked to resolve this issue.
