What is happening? Exchange servers are being removed from service for maintenance/updates. Individual servers will be taken out of service between 9:00 and 10:00 p.m. each night throughout the maintenance period.
When is it happening? Monday, November 19 to Friday, November 30 between 9:00 and 10:00 p.m. each night.
Why is it happening? To keep the software current with vendor-provided updates.