An image processing apparatus stores data including a transmission destination to which an image generated by the scanner is to be transmitted and a token that is used for storing the image in the transmission destination and attempt to transmit an image generated by the scanner to a transmission destination included in the data, using the token, in response to an instruction from a user. If the transmission fails, the image processing apparatus provides a notification about an error notification including information for causing authentication for reacquisition of a token to a client terminal, receive a token reacquired according to the authentication from the client terminal, and attempt to transmit an image generated by the scanner to the transmission destination included in the data by using the reacquired token.