Dear Customer,
The Exchange Server datacentre will be performing upgrades to the core network devices in the Exchange Cloud Data-center, NJ1. During this maintenance all of the services that reside within this data-center will be in-accessible, all incoming email messages will be queued for delivery when the maintenance has finished.
Start: Saturday, January 26, 2013 3PM SGT
End: Saturday, January 26, 2013 7PM SGT
Expected Downtime: 120 Minutes
Regards
Exchange Cloud Team