You can change or augment the list of directories NIS+ searches through by changing the value of the environment variable NIS_PATH. NIS_PATH accepts a list of directory names separated by colons:
setenv NIS_PATH directory1: directory2: directory3 ...
NIS_PATH=directory1: directory2: directory3 ...;export NIS_PATH
NIS+ searches through these directories from left to right. For example:
Like $PATH and $MANPATH, the NIS_PATH variable accepts the special symbol, $. You can append the $ symbol to a directory name or add it by itself. If you append it to a directory name, NIS+ appends the default directory to that name. For example:
If you use the $ sign by itself (for example, org_dir.$:$), NIS+ performs the standard name expansion described earlier: it starts looking in the default directory and proceeds through the parent directories. In other words, the default value of NIS_PATH is $.
Keep in mind that additions and changes to your NIS_PATH may increase the number of lookups that NIS+ has to perform and thus slow down performance.