ConceptDraw Pro is capable of exporting its own diagrams to several other formats, including formats from Microsoft Visio (*.vsd, *.vsdx, *.vdx) and PDF documents. It doesn't seem any other program is capable of exporting *.cdd files to something else.
Convert ConceptDraw drawing diagram file to Microsoft Visio diagram document.
We found one software available in the database for this conversion.
Multiplatform software - convert cdd to vsd on any platform
A diagramming program for Apple Mac and Windows
Convert from cdd file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.