Our monitoring has now shown that this issue has now been fully resolved. Our apologies to those affected for the inconvenience experienced.
We are continuing to monitor the situation but at this time we believe that the issue (a corruption found in the main LDAP configuration) has now been resolved.
NOTE: You may find when logging into the webmail that your first attempt fails, please try again, the second attempt should succeed.
We are escalating the problem to Zimbra to understand why other LDAP servers were not used by our Zimbra platform during the problem.
Work is still ongoing to resolve this issue as our top priority. Our apologies for the continued problems for those affected.
We have identified the source of the issue causing disruption for some of our users. In most cases this has manifest in a slowing of our service, though some users may also experience issues sending emails or logging into webmail. Steps are currently being taken to resolve this issue as soon as possible. Apologies to those affected.
Several reports have been made about a slow down of our Zimbra Email service. We are currently investigating this issue.