The VSAPI 2.6.1 provides programmatic interfaces for Virus Scanning applications to access items and attachments using MAPI or Exchange Web Services. “VSAPI2.6.1 is only provided to organizations enrolled in the VSAPI TAP program. Organizations interested in integrating this API into their virus scanning application, should e-mail requesting participation in the TAP program. Organizations will be provided with the information needed to validate their acceptance into the TAP. Organizations will accept the VSAPI TAP Program Description and must have a TAP Framework Agreement on file, prior to obtaining the VSAPI Documentation,” notes Microsoft.