[05 June 2012]
Update, 6 June, 13:00: Subscriptions to shared mailboxes and "seen" data, and sieve rules have been restored from backup; this does mean that messages received this morning, and marked seen will have become "new" again, and vacation messages that were switched off this morning may be live again.
Update, 6 June, 11:45: Quota has been reset above current usage rates for affected staff. Also, it has been discovered that permissions were not affected by the deletion of email accounts so staff should have access to shared mailboxes as normal.
Over the weekend automated scripts erroneously deleted email accounts for users that were still current members of staff. This occurred between the evening of Sunday 3 June and Monday 4 June. 556 staff were affected.
All mailboxes were recovered and functional again by 9.30am on Tuesday 5 June.
During this period those affected were unable to log into mailboxes. Emails sent to them would have bounced back to those sending it and senders should have received a message informing them of this.
Please note that the recovery process could not recover various settings, including quota and subscriptions.
We are working on recovering quota levels for those set above the default and this should be completed later this morning. If you have an urgent need to increase quota please contact the IT Service Desk.
You will need to re-subscribe to folders, such as shared mailboxes and archive folders to view in webmail and email clients (this does not apply to Mulberry users).
IT Services apologises to those affected by this incident. Should you have any further questions, please contact the IT Service Desk. All those affected have been contacted by IT Services.