Zimbra outage planned for May 25

CIS would like to take the morning of Saturday, May 25th to upgrade the Zimbra server to the latest version 7 release. The outage would last from 9AM until 2PM, during which time you’d be unable to reach your mail or calendar. If this window poses a particular problem for you, please let us know ASAP. This work was originally going to be done over this past weekend (May 11), but was postponed due to a request to have mail remain up during the weekend.
Thanks!