# Enable Default Sender User on Transmissions from a Transmission Profile

Learn how to update your Vault's configuration to enable auto-populating a transmission with a default _Sender User_ based on a _Transmission Profile_.

## About the Feature

Support for the _Default Sender User_ field on _Transmissions_ was added in 21R2. Follow the configuration steps below to enable this feature in your Vault for:

* <a href="/en/gr/01451/#configure-an-fda-esg-transmission-profile">FDA Connection</a>
* <a href="/en/gr/01452/#configure-an-ema-transmission-profile">EMA Connection</a>
* <a href="/en/gr/01453/#configure-the-health-canada-transmission-profile">Health Canada Connection</a>
* <a href="/en/gr/01454/#configure-the-mhra-transmission-profile">MHRA Connection</a>
* <a href="/en/gr/01458/#create-an-as2-gateway-transmission-profile">Custom AS2 Connections</a>
* <a href="/en/gr/01202/#transmission-profile-types">Manual Reporting Destinations</a>

## Update the Transmission Profile Object

### Add Sender User Field to Transmission Profile Layouts

1. Navigate to **Admin > Configuration > Objects > Transmission Profile > Layouts**.
2. We recommend updating the **FDA Gateway Detail Page Layout, AS2 Gateway Detail Page Layout,** and **Manual Detail Page Layout**.
3. Add the **Sender User** field and save the layout.<br>We recommend adding this field to the **Outbound Settings** details section, which is new in the 21R2 template.

### Update the Base Transmission Profile Records Layout

1. On the **Layouts** tab of the **Transmission Profile** object, select **Transmission Profile Detail Page Layout**.
2. In the **Details** section, select **Add**, and then select **Sender User**.
3. Select **Save**.

## (Optional) Update the Transmission Object Field Default

This configuration is required for Sender User to default on manually created transmissions. Otherwise, it is optional.

1. Navigate to **Admin > Configuration > Objects > Transmission**.
2. Go to the **Object Types** tab and select **Submission** from the top row.
3. Select **Sender (User)** and then select **Edit**.
4. In the **Default Value** section, select <img class="inline" src="https://platform.veevavault.help/assets/images/saf-syntax-button.png" alt="Syntax Button" style=" width: 2em;" /> and select the **Transmission Profile > Sender User (`transmission_profile__vr.sender_user__v`)** option.
5. Select **Save**.

In the **Object Types** tab, select **Distribution** from the top row. Repeat the above steps.