Originally from ticket #11452.
Some customers may be unable to connect to their Exchange mailbox when using Outlook. Customers should still have access via Outlook Web Access.
Our engineers are investigating the issue. An update will follow shortly.
Connectivity using the Outlook desktop application has been restored. This issue was only effecting some mailboxes and was caused by a temporary network outage at one of the datacentres we use. Outlook Web App and emails in/out of Exchange were not effected.
If anybody is still having issues with Outlook, please close/re-open the desktop application and connectivity should be restored.
Thank you for your patience and apologies for any inconvenience caused.