# Manage Program Settings
source: https://developer.mastercard.com/mastercard-checkout-solutions/tutorial/onboarding-sandbox/step4/index.md

## 4. Enrollment of a Technical Integrator from Settings {#4-enrollment-of-a-technical-integrator-from-settings}

Note: The information/instructions in this section is only applicable for Technical Integrators enrolling for 'On Behalf Of' programs.

It is recommended for Technical Integrators to take the following steps:

1. [Enroll as a Technical Integrator](https://developer.mastercard.com/mastercard-checkout-solutions/tutorial/onboarding-sandbox/step4/index.md#1-enroll-as-a-technical-integrator)  
2. [Register clients](https://developer.mastercard.com/mastercard-checkout-solutions/tutorial/onboarding-sandbox/step4/index.md#2-register-clients)  

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### 1. Enroll as a Technical Integrator {#1-enroll-as-a-technical-integrator}

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* On the **Program enrollment** tab, select the **Settings** icon.   

![Click Settings](https://static.developer.mastercard.com/content/mastercard-checkout-solutions/documentation/images/dpe_showsettings_sandbox.png "Settings Tab")

* Proceed with the enrollment steps on the Settings page. The enrollment request is auto-approved in the Sandbox environment.

![Technical Integrator](https://static.developer.mastercard.com/content/mastercard-checkout-solutions/documentation/images/dpe_requestdaspenrollment_sandbox.png "Technical Integrator")

* Once the enrollment is approved, you will be able to see the **Clients** tab to add and manage your clients.

![See Clients](https://static.developer.mastercard.com/content/mastercard-checkout-solutions/documentation/images/dpe_edoapprovedshowclients-sandbox.png "See Clients")

### 2. Register Clients {#2-register-clients}

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The **Clients** tab enables the Technical Integrator to add and manage client's company names, and the associated company IDs (assigned by Mastercard) by using the **Register Client** button. Client registration is auto-approved in Sandbox environment.  

![Client Page Options](https://static.developer.mastercard.com/content/mastercard-checkout-solutions/documentation/images/dpe_clientpageoptions_sandbox.png "Client Page")
Note:   

* Currently, you can add upto 20 clients in the list. To increase this number, connect with your [Mastercard representative](https://developer.mastercard.com/mastercard-checkout-solutions/documentation/support/index.md#get-help).  
* It is recommended to use the legal name of your clients.
* For Technical Integrators it is recommended to add client names and company IDs to enroll for 'On Behalf of Commerce Platform Model', 'On Behalf of Shared Merchant Model', and 'On Behalf of Merchant Model'.