The EXI instrument is a camera onboard the EMM spacecraft, with a field a view capable capturing the full disk of Mars throughout its nominal science orbit. Though the use of its multiple band passes (220, 260, 320, 437, 546, 635 nm) and the effective spatial resolution (24 km per native pixel), EXIs primary goal is to provide both regional and global imaging capabilities for studies of the Martian atmosphere with diurnal sampling of much of the planet on a time scale of approximately 10 days. This presentation will provide an overview of EXIs on-orbit instrument performance, a brief description of the observation strategy employed with the start of Science Operations (23-May-2021, Ls=49), and the retrieval results of the ice optical depth and their diurnal behavior for the period of mid-spring through mid-summer. More specifically, we will cover: Status of the instrumental calibration and plans for on-going on-orbit monitoring of instrument performance, including radiometric errors. Plus, we will offer some guidance on interpreting the metadata of the EXI publicly released raw and calibrated images; Illustration of the various disk geometries sampled during an EMM orbit of Mars, and how such observations are combined to provide diurnal coverage of the illuminated portion of the disk/atmosphere; Overview of the ice optical depth retrieval algorithm, and its application to the data obtained since the start Science Operations with an emphasis on the behavior of the aphelion cloud belt.