The portion of the upgrade that was supposed to be completed today is hung due to a few unexpected issues. The maintenance that was scheduled for tomorrow is postponed until these issues can be resolved.
The software on the data center load-balancers is going to be upgraded this week. The passive secondary device will be upgraded on Wednesday August 2nd starting at 10am. On August 3rd EST will failover the pair to the secondary at 8:15am and then upgrade the primary. Services will not experience an outage, however existing connections will not transfer during the forced failover, causing these active connections to be severed momentarily.