Hi,

are there any documentation how to export animations from 3dsMax to NIF to work with Morrowind?

I have no chance to bring Maya Animations to Morrowind, but my MaxNIFPlugin supports Animation export to Morrowind. If someone knows some sort of guide please post here.

(Please: NO Use Blender instead posts)

I'm no expert on this by a long chalk but there could be some useful information in these threads:
http://www.gamesas.com/topic/883042-morrowind-npcpc-animation-questions-and-answers/
http://www.gamesas.com/topic/1360007-morrowind-animation-and-3dsmax/
I'm not sure what most of the people are saying in those threads, hopefully it makes sense to you and helps you out.