Add Workflow Constant and Edit Workflow Constant dialog boxes

​The data type of the workflow constant. Select one of the following options.

• String: A value used to replace the constant when the workflow is run.
• Number: A numeric value used to replace the constant when the workflow is run.
• Date: A date value used to replace the constant when the workflow is run.
• Credential: Values for a username and password credential pair. Use this constant type to provide workflow designers with access to external systems needed by workflows while keeping the actual values private.
  Select one of the following options.
• User Supplied Credential: Manually enter the following values for secure, encrypted storage.
  Note: This option is available only when entry of manually defined credentials is enabled for the web farm.
• Username: The username value used to replace the Username part of the credential constant when the workflow is run. If entering an AD username, remember to include the domain.
• Password: The password value used to replace the Password part of the credential constant when the workflow is run. Enter the password corresponding to the above username.
• Secure Store Credential: Reference username and password values associated with a target application defined in the Secure Store Service on SharePoint.
  For more information about Secure Store Service on SharePoint, see the Microsoft article Configure the Secure Store Service in SharePoint.
• Target Application ID: The unique identifier of the target application (Target Application ID property in the target application settings).
• Secure string: A text value for use in workflow action input fields that do not show the value to the workflow designer. The value is also masked in the constant management page. Use this constant data type for security tokens needed to connect to Nintex connector actions.