Dynamics multi-select field (attribute) can't sync to Marketo

Hi guys,

We have a situation where there is a multi-select field (Attributes) in Dynamics. This multi-select field cannot currently sync to our Marketo instance because this feature is not now available.

Does anyone have any walkaround on this matter? If no, do anyone has any ideas when Marketo will release this feature in the future?

Many thanks
Wayne