Documentation contactSync supports Microsoft Exchange 2019, 2016 and 2013 as well as Exchange Online (Microsoft Office365). Here you can find more info about upgrades and installation of our tool:Upgrade intructions Manual contactSyncQuick Start Guide contactSyncNETsec LogViewer 2 (integrated in contactSync):Manual NETsec LogViewer 2Any questions? Just write to us or give us a call.sales@netsec.de+49 (0) 2421 9987820