Hi,To add a dynamic URL parameter within an email template follow these steps:1. Open the email template you wish to modify.
2. Choose the link where you want to include the dynamic URL parameter.
3. Click the "Insert/Edit Link" or "Insert/Edit Button" button in the email editor toolbar.
4. Enter the base URL, including any static parameters, in the URL field.
5. Append the dynamic URL parameter to the end of the URL, utilizing Odoo's expression syntax "{{...}}".
6. Save the updated email template.
Here's an example of adding a dynamic URL parameter to a link in an email template:

<a href="https://yourdomain.com/sales/orders/%7B%7Bobject.sale_order_id.id%7D%7D" target="_blank">https://yourdomain.com/sales/orders/{{object.sale_order_id.id}}">Click here to view your Sales Order</a>

Ensure the syntax and field names align with your specific use case, referring to Odoo documentation.

Hope it helps

Thank you so much Cybrosys! What if the URL has a unique access token, does that impact the URL at all?