1. Access Customizations: Log in to your Dynamics 365 environment and navigate to the Customizations area.
2. Select Entity: Find and select the entity for which you want to rename the “Related” entities.
3. Open Relationships: Inside the entity customization, locate the “Relationships” or “1:N Relationships” section.
4. Find the Related Entity: Look for the related entity you want to rename. It might be listed as “Related Entity” or similar.
5. Edit Relationship: Click on the relationship you want to rename to open its settings.
6. Update Display Name: Within the relationship settings, find the display name field. This is usually labelled as “Display Name” or “Name”. Change the name to your desired new name.

7. Save Changes: After updating the display name, save your changes.

8. Publish Customizations: Once you’ve made the necessary changes, publish your customizations to make them live in your Dynamics 365 environment.