A process to generate a request for a copy process occurs at the side of a Web server before the copying is actually started since a user has selected the copy function of an MFP. If the user instructs logout from the MFP during the process, it is determined that the user has no right because the authentication context of the user is deleted from the MFP. Accordingly, it is not possible for the user to perform the copying.Upon logout of the user from an image processing apparatus, if a processing request that is received is generated by an external apparatus on the basis of operation information transmitted in accordance with an operation by the login user, the image processing is permitted to be performed in response to the processing request.