It took until the release of Office 2016 to get the news and it's not good for Business Contact Manager users: BCM will not be updated to work with Outlook 2016.
While it's a disappointment, it's not a total surprise as many users wondered how much longer Microsoft would support Business Contact Manager. It had a couple of things going against it: it doesn't generate revenue and it had a small user base.
What this means for current BCM users:
Anyone who uses Outlook 2013 and wants to continue using BCM will need to remain on Outlook 2013. This means BCM users should not update to Office 2016 and will need to block the automatic upgrades that are coming October 1 2015 for Office 365 Personal, Home, and University. Upgrades can be held off for up to a year. (Business subscribers will be automatically upgraded at a later date.)
It's very important that Office 365 BCM users do not upgrade to Office 2016. They will also need to block the automatic upgrades to prevent Office 365 subscriptions from automatically upgrading to Office 2016.
Block Upgrades using GPO
Businesses using Group Policy can block the automatic updates using the updated Office 2013 group policy template. Look for the option to block updates under Computer Configuration\Administrative Templates\Microsoft Office 2013 (Machine)\Updates.
Block Upgrade using Registry
Anyone can block the updates by setting the following registry key (create the keys if they are missing):
You'll need to close and restart Outlook for values under the policy key to apply.
If you don't want to edit the registry yourself, download then run this reg file to set the key.
Revert to Office 2013
Users who were auto-upgraded to Office 2016 from Office 365 Personal, Home, or University can uninstall Office 2016 and install Office 2013 from their Office account portal.
Business subscribers should have time to block the upgrade using the registry key, if not, see Obtaining older versions of Office for the steps necessary to revert to Office 2013.
Possible replacements for BCM are listed here:
Customer Relationship Management (CRM) Utilities