MS DTC lets OLE Transactions-compliant resource managers participate in transactions controlled by X/Open DTP XA-compliant transaction processing monitors such as Encina, TopEnd, and Tuxedo. The XA Mapper makes an OLE Transactions-compliant resource manager behave like an XA-compliant resource manager.
The XA Mapper facility can be used to perform distributed transactions that update OLE Transactions-compliant resource managers on Windows NT systems and other resource managers on other platforms. For example, an application can update an OLE Transactions-compliant resource manager on a Windows NT system and an XA-compliant database on a UNIX system.