Try this:-

• Set Mike in the zero pose, no joint rotations, no scaling, no body or hip translations.
• Load in the skeleton.
• Scale and pose so that the skeleton fits as required.
• File/Export the skeleton OBJ. Select only the options to keep body named parts and weld. Save to a convenient folder in the Geometries directory.
• With Mike still at zero select him and go to Edit/Memorise/Figure.
• Next save Mike figure back to the library as "Mike Bones".
• Open Mike Bones.CR2 in a text editor and search for the two instances of "obj". Change the file path to point to your saved skeleton. You may also want to remove existing redundant morph data. If its left in no harm will be done but it will add to file size. The utility called Morph Manager from the freestuff may help here. File/save.
• Delete the previously loaded skeleton and load in Mike Bones. This should now be able to conform to Mike and fit correctly.

Hope this helps.