Technically, starting with Office 2016. While it was a staple for Outlook 2010 and 2013, it is no longer officially supported or available for download from Microsoft for newer versions of Office. Business Contact Manager - CICorp.com
But with Microsoft’s move to cloud-first productivity, BCM is obsolete. Instead of clinging to outdated software, migrate to a modern Outlook-integrated CRM – your sales tracking, team collaboration, and data safety will thank you. business contact manager for outlook
BCM uses a local SQL database which has a size limit (often 4GB or 10GB depending on the version); once full, the software can stop working. Technically, starting with Office 2016