Hello,

To link the comments field in the Zoom dial pad to activity history in Salesforce, you would typically need to configure this integration through a custom development or an app that connects Zoom with Salesforce.
As this is a specific integration requirement, it may not be directly supported out of the box.

** I give you little general steps you can consider to achieve this integration **

* Identify a Salesforce integration app or platform that supports Zoom integration. 
* Install and configure the chosen integration app or platform within your Salesforce organization. 
* Once the integration is established, you can customize the mapping between Zoom's comments field and Salesforce's activity history.
* Test the integration to ensure that the comments entered in the Zoom dial pad are correctly linked to the activity history records in Salesforce. 
* Train and educate your users on how to utilize the integrated functionality effectively. 
* Provide guidelines on when and how to use the comments field in Zoom to ensure accurate tracking and linkage to Salesforce's activity history.

** Remember to consult the documentation and support resources provided by the chosen integration app or platform for detailed instructions and guidance on configuring the integration between Zoom and Salesforce. https://www.myaarpmedicares.us/ **