What we are going to do
In this tutorial we are going to show you how two different ways to find the Linking Module API fields, and we are going to review an example of how to search for records in a Multi-Select Look Up field.
When you create a Multi-Select Look Up fields (MSLU), a new module called "Linking Module" is created. This module holds some basic information about how the two records are related. The Linking Module has it's own API name, so if you want to use it in a function, you have to know the API name. There are 2 ways you can get the API Name: searching in the CRM settings, or using a custom function.
Linking Module API Name
CRM Settings
- In the CRM, go to the setup.
- On the search bar, look for "CRM API", and open the first result.
- Click on the "API names" sub-tab.
- Open any of the modules listed here.
- Now, on the "filters by" section, click on the modules field.
- If you scroll all the way down, you will find the Linking Modules.


Custom function
- In the CRM, go to the Setup.
- Under "developer space", click on "connections".
- Click on "create connection".
- The service is "Zoho OAuth".
- Name the connection. We are going to use "linking_module_API".
- The scope is "ZohoCRM.settings.modules.ALL". Use the magnifier to easily find it.
- Click on "create and connect".
- Click on "connect" and allow any permissions you are requested.
- In the CRM, go to the Setup.
- Under "developer space", click on "functions".
- Create a new function with the "new function" button.
- Name the function.
- The category is "automation".
- Click on "create".
- Copy the first code listed below (called "Find Linking Modules API Names")
- Paste the code in the function.
- Replace the connection name with the name of the connection created in the previous step.
- Click on "Save & Execute".