Port Blair, Dec. 21: Group of Indian Defence Accounts Service (IDAS) Probationers of 2021 batch, as part of their Tri-Services Command attachment to Andaman & Nicobar Command called on Admiral D K Joshi, PVSM, AVSM, YSM, NM, VSM (Retd.), Hon’ble Lt Governor, A&N Islands and Vice-Chairman, Islands Development Agency, today at Raj Niwas.