ITS will install Microsoft patches to the Vmail and Unified Communication servers beginning Friday, 9/21, at 10:00pm and ending Saturday, 9/22, at 3:00am.  During this time, there will be rolling outages to the Exchange and Office Communications Server (OCS) services as each server is rebooting.  Internal Lync users  will be signed out of their client during reboots and can immediately sign back in, but external Lync users will experience outages while the OCS Edge server reboots.