To update a Control rig that uses MotionBuilder 5.5 Limits:
Load in a version of MotionBuilder prior version 2009 your file containing the character that uses the “Enable MB 5.5 Limits” property.
Select all the skeleton’s bones and open the Properties window.

Got it

Select the All (Type) view in the View menu to display all available properties.

Cant find this one in the view or display drop downs.

Expand Degrees of Freedom > Rotation > Post Rotation and disable the “Enable MB5.5 Limits” option.
Once you disable the “Enable MB5.5 Limits” option, you are ready to update the rig.

Ah, no DOF heading in properties with bones selected.

Any suggestions welcome.

Cheers

ps what happened to the email notification checkbox?

Thankyou Steve.

Ok found it.
Select all the bones on the skeleton,
Under properties there is a display type you can choose called all types.
Under there is a folder where the DOF settings live.