This application aims to modify user's email adress type. The concerned users are listed in an excel file that must be provided to the application as input. The application changes every email adress of "Alternative" type to "Personal" type for the user list specified in the input file. The input file should have the same informations and format as the file 'inputFile.xlsx' wich is provided as example with the documentations. The input file must have xlsx as extension. Requirements : For running the application you need: java 1.8 or above to be installed on your computer. Running the application : Download the .jar and .bat files. Open the bat file and fill in : The complete path of your inputFile, Your apikey. Do not forget to put space between the parameters. People who don't work on windows can create a .sh to replace the .bat and copy from the .bat only the line beginning with java. We can also run this line from a command prompt or a terminal without going through a .bat or .sh Save the .bat and Double-click on it to make the application run. The command prompt displays any user errors that the application could not handle. The message "*********************It is done******************************" is displayed when the execution is complete. It is very important to test on the sandbox environment before running it on the production.