Currently IDMF does not work on AX2012 to flush the data from the InventDim table. When using serialization this table grows exponentially over time. On D365F&O the client no longer have access to the data so even if MS were to fix IDMF to do this, it would not be applicable on the D365 F&O model.

Suggest two tracks to resolve this:
1) Develop a similar solution to IDMF for D365F&O where you have the capability to request certain data is cleansed up to a certain date (Effectively an IDMF solution)
2) Create a "closed" field available like the one on InventTrans which can be populated and this would stop the entire history being accessed.