Sakai is working normally, however some people may be seeing a "Not Found" error message when trying to access Sakai. The quick solution is to use a slight variation of the usual link:
https://sakai.rutgers.edu/portal
The problem only occurs when you leave off the "/portal" in the link above, and is an unexpected side-effect of the server migration over the weekend. OIT is aware of the problem and is working on a permanent fix.
