For the toolbox to be available to all workers, the command
addpath \\server\share\to\toolbox
should be automatically executed on all workers. To accomplish this, please edit the script file:
$MATLABROOT\toolbox\local\matlabrc.m
This script is automatically run when a worker starts. You can simply add the above mentioned line to this script file.
Please note though, on Windows by default MATLAB workers are executed under the SYSTEM account; depending on your network configuration this account might not have sufficient rights to access your toolbox when it is located on a network share. To resolve this issue you could change the account under which the "MATLAB Distributed Computing Server" service is run.
