From the e-Procurement vendor (SciQuest):

Infrastructure maintenance is scheduled for Saturday, December 10, from 6:00 p.m. through 2:00 a.m. EST. UIT and Production SelectSite will be unavailable during this time.

SciQuest typically provides this detail within the monthly SciQuest Cloud Report and in the December report, that information was mislabeled and positioned under the SIMS Products heading.

We appreciate your patience during this scheduled maintenance window.