Exchange Toolbox Unhandled Exception – Deserialization fails

UPDATE 15/03/2023: After Installation of MS Exchange SU March 2023 the issue is resolved! Download Links March 2023 SU Exchange Exchange Server 2013 CU23 (note that support and availability of SUs end on April 11, 2023) Exchange Server 2016 CU23 Exchange Server 2019 CU11 and CU12  Some people may recognize an error when entering the good old Exchange Toolbox they receive a …