Attribute "management server" on rtsm

Hello

We use a dfp with a topology import from NNMi to populate our RTSM.

We had a new Regional Node Manager, and we want to retrieve the Node attribute "Management Server" we can see on the form NODE : 

  

But i can't see this attribute on RTSM.

Do you know what can i do to retrieve this attribute ? 

Thanks a lot.