MHS Office Closures and System Unavailability - An important message for our customers as we near the holiday season. Our offices will be closed on December 25th, December 26th, and December 27th and again on January 2nd. Our customer service team will not be available to support you on these days. Our business systems supporting purchasing, including our storefront at, will be unavailable on January 2nd while we do annual maintenance. Our assessment and learning portals sites will remain available however, purchase of training, uses and tokens will not be available.