# USPS ### Connecting Using the Microsoft ODBC Data Source Administrator You can use the Microsoft ODBC Data Source Administrator to edit the DSN configuration. Note that the DSN is created during the installation process. Complete the following steps to edit the DSN configuration: 1. Select Start > Search, and enter ODBC Data Sources in the Search box. 2. Choose the version of the ODBC Administrator that corresponds to the bitness of your application (32-bit or 64-bit). 3. Click the System DSN tab. 4. Select the system data source and click Configure. 5. Edit the information on the Connection tab and click OK. Note: For .NET Framework 4.0, the driver distributes Microsoft Visual C++ 2017 Redistributable. For .NET Framework 3.5, the driver distributes Microsoft Visual C++ 2008 Redistributable. The ODBC Driver for USPS uses these pieces of information in order to authenticate its actions with the USPS service. * PostageProvider: The postage provider to use to process requests. Available options are ENDICIA and STAMPS. If unspecified, this property will default to ENDICIA. * UseSandbox: This controls whether live or test requests are sent to the production or sandbox servers. If set to true, the Password, AccountNumber, and StampsUserId properties are ignored. * StampsUserId: This value is used for logging into authentication to the Stamps servers. This value is not applicable for Endicia and is optional if UseSandbox is true. * Password: This value is used for logging into Endicia and Stamps servers. If the postage provider is Endicia, this will be the pass phrase associated with your postage account. It is optional if UseSandbox is true. * AccountNumber: The shipper's account number. It is optional if UseSandbox is true. * *PrintLabelLocation: This property is required to use the GenerateLabels or GenerateReturnLabels stored procedures. This should be set to the folder location where generated labels should be stored.* --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.appstrategy.com/apprules-r-documentation/platform/platform-features/system-settings/data-sources/connection-settings/shippingandmailing/usps.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.