An image processing system comprising: reception means configured to receive an input of authentication information from a user; authentication means (210, 310) configured to authenticate the user based on the authentication information received by the reception means; setting means (511, 512, 513, 514, 515) configured to set a destination of image data; and transmission means configured to send the image data to the destination set by the setting means, characterized by further comprising: registering means configured to register, as a destination for the authenticated user to be set using an operation key, folder information set by an administrator or folder information set by the authenticated user different from the administrator; control means (210, 211) configured to, in the case where the destination to be set in response to an operation of the operation key is the folder information set by the authenticated user and the destination to be set by the setting means is limited to the destination to be set using the operation key, perform control not to allow a destination setting using the operation key; and display means configured to, in the case where the destination to be set in response to an operation of the operation key is the folder information set by the administrator, display the operation key even if the destination to be set by the setting means is limited to the destination to be set using the operation key. reception means configured to receive an input of authentication information from a user; authentication means (210, 310) configured to authenticate the user based on the authentication information received by the reception means; setting means (511, 512, 513, 514, 515) configured to set a destination of image data; and transmission means configured to send the image data to the destination set by the setting means, characterized by further comprising: registering means configured to register, as a destination for the authenticated user to be set using an operation key, folder information set by an administrator or folder information set by the authenticated user different from the administrator; control means (210, 211) configured to, in the case where the destination to be set in response to an operation of the operation key is the folder information set by the authenticated user and the destination to be set by the setting means is limited to the destination to be set using the operation key, perform control not to allow a destination setting using the operation key; and display means configured to, in the case where the destination to be set in response to an operation of the operation key is the folder information set by the administrator, display the operation key even if the destination to be set by the setting means is limited to the destination to be set using the operation key. registering means configured to register, as a destination for the authenticated user to be set using an operation key, folder information set by an administrator or folder information set by the authenticated user different from the administrator; control means (210, 211) configured to, in the case where the destination to be set in response to an operation of the operation key is the folder information set by the authenticated user and the destination to be set by the setting means is limited to the destination to be set using the operation key, perform control not to allow a destination setting using the operation key; and display means configured to, in the case where the destination to be set in response to an operation of the operation key is the folder information set by the administrator, display the operation key even if the destination to be set by the setting means is limited to the destination to be set using the operation key.