Dear participants, This is to inform you that *the evaluation phase of the Graph Neural Networking challenge will start on Oct. 3rd at 11:59:59 AM (CET), and it will take place until Oct. 17th at 11:59:59 AM (CET)*. The evaluation will be done through the BNN platform, we attach a document detailing how to prepare your submissions. *Please, register in the platform before Oct. 3rd to avoid potential issues*. Also, we recommend to validate the output format of your submissions. To do so, you can use a Python script we provide in the challenge's Github repository (see attached document). We would like to encourage all of you to participate in the evaluation. Even if you think your solution may not be among the top ones, you may eventually be gladly rewarded and appear in the final ranking we will post on the challenge website. Also, keep in mind that there are three winning positions, which will advance to the Grand Challenge Finale of the ITU AI/ML in 5G challenge. *Please remember to also register on the ITU challenge portal if not done yet* ("Login" and "Create Team"): https://challenge.aiforgood.itu.int/match/matchitem/69 Do not hesitate to contact us if you have any questions. Enjoy the challenge! 😊 Best regards, José Suárez-Varela GNNet challenge website: https://bnn.upc.edu/challenge/gnnet2022