domino-exchange

 https://docs.microsoft.com/ru-ru/exchange/mail-flow/message-size-limits?view=exchserver-2019

NSA discovers critical Exchange Server vulnerabilities, patch now   https://www.bleepingcomputer.com/news/security/nsa-discovers-critical-exchange-server-vulnerabilities-patch-now/?fbclid=IwAR1VJZ-pFi4HffKF-0l84qRuN6rhmITLizPAhuJOMwCfw5oXZyK4OXBakKc Select your scenario https://exupdatestepbystep.azurewebsites.net/ Released: April 2021 Exchange Server Security Updates https://techcommunity.microsoft.com/t5/exchange-team-blog/released-april-2021-exchange-server-security-updates/ba-p/2254617

 Install-WindowsFeature AS-HTTP-Activation, Desktop-Experience, NET-Framework-45-Features, RPC-over-HTTP-proxy, RSAT-Clustering, RSAT-Clustering-CmdInterface, RSAT-Clustering-Mgmt, RSAT-Clustering-PowerShell, Web-Mgmt-Console, WAS-Process-Model, Web-Asp-Net45, Web-Basic-Auth, Web-Client-Auth, Web-Digest-Auth, Web-Dir-Browsing, Web-Dyn-Compression, Web-Http-Errors, Web-Http-Logging, Web-Http-Redirect, Web-Http-Tracing, Web-ISAPI-Ext, Web-ISAPI-Filter, Web-Lgcy-Mgmt-Console, Web-Metabase, Web-Mgmt-Console, Web-Mgmt-Service, Web-Net-Ext45, Web-Request-Monitor, Web-Server, Web-Stat-Compression, Web-Static-Content, Web-Windows-Auth, Web-WMI, Windows-Identity-Foundation