Accessing Key user fields in Other BO's action/events

Hi,

There is a Key user field created in "Account" Screen, related BO would be "Customer" or "BusinessPartner".

In my solution I have created a reference of Key users fields, and also extend the SAP BO ServiceRequest.

Now I want to access Key user fields created in Account/BusinessPartner in BeforeSave event of ServiceRequest.

Is this possible to read the KUT fields in other BO's?

Thanks

Sunil