Segmenting using a field in a CRM custom module

Segmenting using a field in a CRM custom module

For reasons which I cannot now remember, when we were originally setting up CRM, we couldn't use the normal "Industry" field. The developer created a custom module which held the industry only.

Now I would like to segment our CRM data and send emails by industry (category). The CRM module list doesn't include this field, and the custom module ONLY includes this field.

Is there any way I can achive this?