# Using the ACE Mappings page
<a name="mapping-page"></a>

AWS Partner Central provides the following ways to navigate to the **ACE Mappings** page: 
+ From the App launcher, search for and choose **AWS Partner CRM connector**.
+ Choose the **ACE Mappings** tab.

  —OR—

  Choose the **Guided setup** tab, and in the **Map leads and opportunities** section, choose **Start** or **Review**. 

On the **ACE Mappings** page, use the left navigation pane to toggle between opportunity and lead mappings. Use the **Object Selector** to choose the source object to map APN leads and opportunities. The object selector supports mapping standard opportunities, lead objects, and custom objects. Use the **Mapping View** and **Type View** filters to toggle among mapped fields, unmapped fields, required fields, and optional fields. 

On the **ACE Mappings** page, the **AWS Fields** column for the object indicates the corresponding target APN fields. The **Salesforce Fields** are source fields of the selected object in the partner’s organization. **Salesforce Fields** are filtered to show only applicable data types available in the organization to be mapped to the corresponding APN field. For example, a text field in APN can be mapped only to a text (string) field in the partner’s organization.

Partners can control inbound updates on mapped fields if they don’t want a field updated by APN. To do this, set the **Enable Inbound Updates** toggle to **False**.

For one-to-one mapping, select the relevant source field, and then choose **Save**.