On-Prem Exchange 2016 and 2019 Anti-Malware Issue
Happy New Year and welcome to 2022! On-prem Exchange 2016 and 2019 anti-malware issue! Mail flowing through on-prem Exchange will have the majority (if not all) messages queued with this… “Last Error: Message deferred by categorizer agent” Though it is stated that this issue started around midnight local times on Sat 1 Jan 2022, messages…