3326556 - Error "smdserver.connection.requiresAuthentication is still set to true is not supported" when trusting Diagnostics Agent in SAP Solution Manager 7.2

The following error appears in the Diagnostics Agent's SMDSystem.*.log :

[Thread[Connector,5,main] ] Info   [ms://<solman.full.qual.host.name> :<xxxx> /P4] Authentication in progress ... (method: basic)
[Thread[Connector,5,main] ] Error  Failed to connect to SMD server - null
[Thread[Connector,5,main] ] Error  Connecting to SMD server ms://ms://<solman.full.qual.host.name> :<xxxx> /P4 failed
[EXCEPTION]
javax.naming.NoPermissionException: 'Trust Agent' has not yet been executed or it failed. (smdserver.connection.requiresAuthentication is still set to true is not supported

SAP Solution Manager 7.2

smdserver.connection.requiresAuthentication, method, basic, true, verified-certificate, trust agent  , KBA , SV-SMG-DIA-SRV-AGT , Agent Framework , Problem