This means that messages can contain any of the OLE 2.0 compound document features, including OLE objects embedded in messages, and cross application drag and drop.
Linked information is stored in the source document.
The destination contains a code that supplies the name and location of the source application, document. A linked object gets updated whenever the source document changes. Embedded information is stored in the destination document, and the code associated with OLE points to a source application rather than a file. An embedded object does not get updated when the source document changes. Embedded objects are also commonly referred to as attachments.