# Adding the 'ip_importid' attribute

A common requirement when importing data, particularly from legacy CRM systems, is to store the ID of the data or entity in the source system.

For example, when migrating from Salesforce.com you will need to store the account and contact ids; when migrating from GoldMine, the accountno value; when moving data from an accounting system, the account id.

Most of the entities in Dynamics CRM do not have an attribute that can be used for this. When you create the connector you have an option:

'Add ip_importid attribute to entities'

Checking this will cause Inaportto automatically add an attribute called 'ip_importid' to any entity that you map data to. this attribute will be of type text, with a length of 100 characters.

This attribute will then be available for mapping.

NOTE: When an attribute is added to an entity, the schema changes and is automatically published.