Hi @Sendoh_Daten,
The messages from mongo-kafka source connector are Extended JSON strings. What does the document look like in the collection ? Especially for fullDocument.received field.
Looking at Kafka Connect TimestampConverter SMT, the format property can used to generate the output or parse the input. Could you clarify whether you’re trying to generate a string date in the format of yyyy-MM-dd'T'HH:mm:ssZ ?
Regards,
Wan.