Change Mailbox Folder location

Stop the Gateway service by clicking on the desktop shortcut "MailStore Gateway" and then click "Stop Service"
Move the folder "C:\ProgramData\MailStore\Gateway" to your desired location.
Open an elevated command prompt (cmd).
Navigate into "C:\ProgamData\MailStore"
Execute the command:

mklink /D Gateway <full_path_where_you_moved_the_folder_to>

Restart the Gateway service by clicking on the desktop shortcut "MailStore Gateway" and then click "Start Service"

In our example below, we moved the "Gateway" folder to the "C:\TestDirectory" folder. Remember, you can move the Gateway folder to any local drive on the server.

After the command is ran successfully in the command prompt and the symbollic link is created, when you go back into the "C:\ProgramData\MailStore" directory, you will now see a shortcut which indicates that the move process was completed successfully. Please refer to the picture below.