Hi, Is it possible to use the substitution property mechanism from code when initializing logback? LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory(); try { JoranConfigurator configurator = new JoranConfigurator(); configurator.setContext(lc); lc.shutdownAndReset(); // Can't set the property here because the execution context is null configurator.doConfigure(contextProperties.getProperty(" logging.properties")); configurator.getExecutionContext().addSubstitutionProperty(" service.name", "serviceOne"); // I think this is to late to set the property and it isn't used anymore } catch (JoranException je) { StatusPrinter.print(lc); } with configuration file: <?xml version="1.0" encoding="UTF-8"?> <configuration> <appender name="console" class="ch.qos.logback.core.ConsoleAppender"> <layout class="ch.qos.logback.classic.PatternLayout"> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36}.%M [%line] - %msg%n</pattern> </layout> </appender> <appender name="A2" class="ch.qos.logback.core.rolling.RollingFileAppender "> <file>log/${service.name}.log</file> <Append>true</Append> <layout class="ch.qos.logback.classic.PatternLayout"> <pattern>>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36}.%M [%line] - %msg%n</pattern> </layout> <triggeringPolicy class=" ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy"> <MaxFileSize>10MB</MaxFileSize> </triggeringPolicy> <rollingPolicy class=" ch.qos.logback.core.rolling.FixedWindowRollingPolicy"> <FileNamePattern>log/${service.name}.%i.log.zip</FileNamePattern> <MinIndex>1</MinIndex> <MaxIndex>10</MaxIndex> </rollingPolicy> </appender> <root> <level value="INFO"/> <appender-ref ref="console"/> </root> </configuration> making every service that reuses this configuration but log to it's own logfile. Thanking you in advance, Tom