[SyncEvolution] Naming a folder when using ActiveSync

I am trying to sync with a particular, named Exchange contacts folder. I can sync with the default contacts folder but I can't find any way to specify a name. I have tried setting the database attribute in the target-config. This gets passed to activesyncd who inserts the name in the <CollectionId>. Unfortunately Exchange doesn't like that -- it wants the collection ID number, not the folder name. I have not yet tried using the collection ID number of the folder in the database attribute. But even if that works, it would be much easier if activesyncd would translate the folder name into the ID using a FolderSync. Before I look at adding code to do that, can you confirm that the approach of setting the database attribute is the correct way to specify the folder? Graham