In practice, these windows are typically used only one night every few weeks to apply critical system patches and updates. Most interruptions to services last around 5-10 minutes and are resolved before 4:00AM CST/CDT , but occasionally they may take slightly longer to complete and extend into the 4:00 - 5:00AM CST/CDT hour.
Contact us at https://servicedesk.letu.edu or 903-233-3500 if you believe you are experiencing a service interruption not resolved in a timely manner during this window.
From time to time, specific applications may have additional scheduled service windows outside the hours above. These windows will be communicated on our IT Twitter feed at https://twitter.com/letuit and as applicable via email to key stakeholders of the affected services.