There is a free plugin between Sage CRM and MS Outlook as well as a third-party solution called Accelerator that offers a deeper, more practical integration. We (My CRM Manager) strongly recommend Accelerator. For companies that use Outlook, Accelerator is brilliant.
Option 1: Accelerator is a third party solution offering several key features including deep integration with Sage CRM. This application supports current versions of Sage CRM and Outlook 2013, 2016 (both 32 and 64 bit) and 365. Below is a brief overview video summarizing the Outlook portion of Accelerator. Demonstrations of Accelerator can be provided on request and you can download a brochure from this link. A user guide can be downloaded from this link.
Option 2: Sage CRM comes bundled with a plugin for MS Outlook versions 2013, 2016 and 365 and this is a free plugin. Below is a short video overview of the features that are included.