I’ve seen before that you should be very careful in choosing the naming of attributes in your management agent configuration. Choosing the wrong name could result in unexpected behavior.
For instance: if you choose ‘Function’ as an attribute name, it is not possible anymore to define an Inbound Attribute Flow from the portal that makes use of the ‘Advanced Function’ functionality. Clicking the Function attribute from the dropdownlist displays the function controls. Clicking one of the available functions from the list is not possible. I recorded the behavior here:
If you change that attribute name in the management agent to something else, everything works again. At this time, I’m not aware if service pack 1 of FIM 2010 R2 solves this issue.