IMPORTANT! Office 2016 is not yet compatible with CMS

IMPORTANT! Office 2016 is not yet compatible with CMS

It is very important that you do not upgrade to Office 2016. The current version of CMS (15.8.7) is not compatible with Office 2016 and will not run at all if you upgrade to that version of Office.

If you are using Office 365, you are most likely getting Office Updates automatically. It is therefore very important that you configure your computer to prevent Office 365 from updating to 2016.

Here is a link to a Microsoft page that details how this is done.
https://support.microsoft.com/en-us/kb/3097292

If you already updated your Office 365 to 2016, you would need to a) uninstall Office 365 - 2016, b) reinstall Office 365 - 2103 and then c) prevent Office 365 from updating to 2016.
  1. Uninstall Office 365
  2. Download for Office 365 2013
  3. Prevent Office 365 from updating
If you're using Office 365 it is very important to take care of this ASAP to ensure that CMS continues to function.

We are working as quickly as possible to post an update to CMS which will be compatible with 2016, first in BETA and then with an official release.

12/15/2015 UPDATE: 
We now have a beta version for CMS that is compatible with Office 2016 (32 bit). If the above steps did not work for you, and you would like to use the beta, please email support@chabadms.com and let us know.

12/27/2015 UPDATE:
Version 15.12.27 has been posted which brings beta compatibility to Office 2016 (32 bit). It can be downloaded by logging in to the support website and clicking Downloads.