Verbose DLOAdminSvcu.log shows the following error ;
dloadminsvcu.exe, 924:, T>, EdgeServerCertificateMonitor.cpp( 147 ), EdgeServerCertificateMonitor::PerformCheck():: Connecting to host, edgeservername:443
dloadminsvcu.exe, 924:, E>, EdgeServerCertificateMonitor.cpp( 151 ), EdgeServerCertificateMonitor::PerformCheck() Failed to connect to host edgeservername:443
dloadminsvcu.exe, 924:, T>, EdgeServerCertificateMonitor.cpp( 187 ), EdgeServerCertificateMonitor::PerformCheck() No certificate present for this edge server
This issue can be caused by either;
Edge\IO Server components having been installed in the past, references still exist in the DBs, but no Edge or IO Server components are installed now.
or
The Edge server is configured, but cannot be reached to verify the certificate.
Upgrade to DLO version 9.8.2, where this issue is resolved.