An information processing system (1, 2) implemented by one or more information processing apparatuses, the information processing system (1, 2) comprising: an electronic data receiving unit configured to receive electronic data via a network from an external apparatus; and a data conversion unit configured to identify a data format corresponding to attribute information of a user operating the external apparatus by referring to a first storage unit (31, 33) storing data formats and sets of attribute information in association with each other, wherein the attribute information includes at least one of a country, a region, and positional information, and convert the received electronic data into output data according to the identified data format, wherein the information processing system (1, 2) further comprises a first receiving unit configured to receive a first user identifier and a first organization identifier from the external apparatus; and a first authentication unit configured to perform authentication based on the first user identifier and the first organization identifier by referring to a second storage unit (31, 33) storing one or more second user identifiers in association with second organization identifiers; wherein the first authentication unit is configured to perform the authentication by identifying an organization identifier matching the first organization identifier within the second organization identifiers and identifying a user identifier matching the first user identifier within the second user identifiers associated with the matching organization identifier; wherein the electronic data receiving unit is configured to receive the electronic data from the external apparatus when the authentication performed by the first authentication unit is successful; and wherein the data conversion unit is configured to identify the attribute information corresponding to either of the first organization identifier and the first user identifier by referring to a third storage unit (31, 33) storing plural sets of attribute information in association with either of the second organization identifiers and the second user identifiers, respectively, and identify the data format by referring to the first storage unit (31, 33) based on the identified attribute information. an electronic data receiving unit configured to receive electronic data via a network from an external apparatus; and a data conversion unit configured to identify a data format corresponding to attribute information of a user operating the external apparatus by referring to a first storage unit (31, 33) storing data formats and sets of attribute information in association with each other, wherein the attribute information includes at least one of a country, a region, and positional information, and convert the received electronic data into output data according to the identified data format, wherein the information processing system (1, 2) further comprises a first receiving unit configured to receive a first user identifier and a first organization identifier from the external apparatus; and identify a data format corresponding to attribute information of a user operating the external apparatus by referring to a first storage unit (31, 33) storing data formats and sets of attribute information in association with each other, wherein the attribute information includes at least one of a country, a region, and positional information, and convert the received electronic data into output data according to the identified data format, wherein the information processing system (1, 2) further comprises a first receiving unit configured to receive a first user identifier and a first organization identifier from the external apparatus; and a first authentication unit configured to perform authentication based on the first user identifier and the first organization identifier by referring to a second storage unit (31, 33) storing one or more second user identifiers in association with second organization identifiers; wherein the first authentication unit is configured to perform the authentication by identifying an organization identifier matching the first organization identifier within the second organization identifiers and identifying a user identifier matching the first user identifier within the second user identifiers associated with the matching organization identifier; wherein the electronic data receiving unit is configured to receive the electronic data from the external apparatus when the authentication performed by the first authentication unit is successful; and wherein the data conversion unit is configured to identify the attribute information corresponding to either of the first organization identifier and the first user identifier by referring to a third storage unit (31, 33) storing plural sets of attribute information in association with either of the second organization identifiers and the second user identifiers, respectively, and identify the data format by referring to the first storage unit (31, 33) based on the identified attribute information.