To import the values of a dropdown Custom Field that you have in your CRM to ActiveDEMAND you will need to follow a few steps.
Step 1 - Create a multi-option picklist within ActiveDEMAND
In your ActiveDEMAND account, go to Administration => Account Settings. Scroll down to Custom Field Types. Choose if you want to create a field for a Contact or an Organization. Click [ADD CUSTOM FIELD TYPE] button:
Check the "Has dynamic options" checkbox. This will allow the options list to be dynamically updated from your CRM.
Step 2 - Edit the mappings in CRM Contact Updates
Go to Contacts => CRM Contact Updates and edit the mappings. Map your pipedrive multi-option or single-option picklist to your newly created ActiveDEMAND multi-option or single-option picklist.
The ActiveDEMAND custom field will automatically update as data is pushed into it from the CRM.
This is everything that needs to be done!