Creo ModelCHECK > config_init_options > MC_AUTHORIZATION_FILE
  
MC_AUTHORIZATION_FILE
<Y/N>
Specifies whether an external text file (external_access.txt) is used to control access to the Creo ModelCHECK configuration files.
 
* The external_access.txt file is used only if you have set the MCDIR environment variable. This file is located in the text subdirectory in the config directory specified by the MCDIR environment variable.