Yesterday afternoon I upgraded ZCS from 5.0.16 to 5.0.18. The entire upgrade went very smooth. I am using the trial edition and this was the first upgrade I did, so impressed at the ease of it. Unfortunately after the upgrade completed I could not authenticate via CAS.
I found that my preauth.jsp file was completely removed and the CAS filter parameters in zimbra.web.xml.in was wiped.
I did not see this in the upgrade procedures, anyone else see something like this?