Client wants to make his custom symbols available to other users.
Solution
All you need to do (after importing the custom symbol files into Teamcenter) is point to the folder in the Customer Defaults under the Symbol tab:
Hardware/Software Configuration
Platform: na
OS: n/a
OS Version: n/a
Product: NX
Application: KDA
Version: V1961
Function: REUSE_LIBRARY
Ref: 002-8569066