What is the CLIUSR Account? With Exchange 2016-19 / Server 2016-19 set up in DAG. you get an alert in ECP that says “The certificate ‘CLIUSR’ on server ‘servername’ is about to expire on ‘date’” The CLIUSR account is a local user account created by the Failover Cluster feature. Windows Server Failover Cluster service uses thisContinue reading “CLIUSR certificate expiration”