Our network admin team has resolved the issue.
We will continue to monitor it over the next 24 hours.
Our network admin team is aware of an ongoing issue with our Microsoft Exchange 2013 platform. They are investigating the issue and will provide updates as soon as we have them.
Impact to clients:
Clients may be unable to connect to the exchange server cluster. All email will be intermittent during this period. All mail will be queued and no mail will be lost.
We apologize for any inconvenience this maintenance may cause you. If you have any questions or concerns, please do not hesitate to contact support at firstname.lastname@example.org