The maintenance window time is scheduled to accommodate across a large number of customers, and to enable multiple teams and vendors who will be involved.
The maintenance will bring new firewalls into Production. A significant amount of pre-maintenance preparation is being completed to minimize the actual impact periods. Service access will be impacted briefly during the actual transition to the new systems during routing optimization. It would be prudent to expect intermittent service disruption throughout the 2-hour window, however, we are working to make this a near-zero downtime maintenance.
Please contact Support directly if you have any questions.