This task requires the System Administrator or System Customizer security role A defined set of privileges. The security role assigned to a user determines which tasks the user can perform and which parts of the user interface the user can view. All users must be assigned at least one security role in order to access the system. or equivalent permissions. Customization tasks can be performed only while you are online. More information: Customization Permissions
When you create a custom entity A developer or system customizer can create custom entities in Microsoft Dynamics CRM. This entity is created in the customization area and can be included in a solution. A custom entity might be customizable further, depending on the restrictions placed on it when created., default icons are provided. You can upload and use icons of your choice. You cannot modify the icons for system entities System entities, while a part of Microsoft Dynamics CRM by default, cannot be customized or added to a solution. System entities do not display in the Customization area. .
In the Customization area, click Customize the System.
Under Entities, click the custom entity for which you want to update the icon. If this is a custom icon, on the toolbar on the top, click the Update Icons button.
In the Select New Icons dialog box, in the section for which you'd like to add an icon, click the Browse button to assign the path for the image file.
Click OK.
Publish your customizations:
To publish customizations for only the component that you are currently editing, on the Home tab, in the Save group, click Publish.
To publish customizations for all unpublished components at one time, click Publish All Customizations.
You might not see the new icons in Microsoft Dynamics CRM until you close and reopen the Microsoft Dynamics CRM client.