Scheduled Maintenance - Improving your CMS Experience We’re working behind the scenes continuously improving CMS for you. As part of our ongoing commitment to providing you with a reliable and improved CMS experience, we’ll be carrying out scheduled system maintenance. During this time, some CMS functions may be temporarily unavailable and you may experience brief interruptions while we complete the maintenance. We understand how important it is to have access to CMS when you need it, and we’ll work to keep any disruption to a minimum. Thank you for your patience and understanding while we make these improvements.