Update 3:10pm 10/28/14:
All updates are complete!
Update 12 noon 10/28/14:
Updates are proceeding along, taking a bit longer than anticipated. No problems so far, but we are not complete at this point (about 70% complete).
Starting at approximately 10am we will apply Update Rollup 7 to the Exchange servers. It is primarily a bug fix patch with some Daylight Savings Time updates.
There will be rolling reboots, users may get the momentary disconnection message as the mailbox servers failover, users with Outlook in Cached mode should not see anything.
We expect patching to finish up around lunch time. No mail outage is expected.