diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/liquibase/LiquibaseEndpointAutoConfigurationTests.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/liquibase/LiquibaseEndpointAutoConfigurationTests.java
index b420015975..1e0f11edef 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/liquibase/LiquibaseEndpointAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/liquibase/LiquibaseEndpointAutoConfigurationTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/security/AuthorizationAuditListenerTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/security/AuthorizationAuditListenerTests.java
index 43e28dca81..259a1b3967 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/security/AuthorizationAuditListenerTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/security/AuthorizationAuditListenerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/DefaultRestartInitializer.java b/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/DefaultRestartInitializer.java
index d9bf512180..f12d9413d8 100644
--- a/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/DefaultRestartInitializer.java
+++ b/spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/restart/DefaultRestartInitializer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/DefaultRestartInitializerTests.java b/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/DefaultRestartInitializerTests.java
index cd145725de..aeab3fb2c2 100644
--- a/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/DefaultRestartInitializerTests.java
+++ b/spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/restart/DefaultRestartInitializerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-boot-project/spring-boot-properties-migrator/src/main/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationReporter.java b/spring-boot-project/spring-boot-properties-migrator/src/main/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationReporter.java
index 813a0ac367..4c90120c42 100644
--- a/spring-boot-project/spring-boot-properties-migrator/src/main/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationReporter.java
+++ b/spring-boot-project/spring-boot-properties-migrator/src/main/java/org/springframework/boot/context/properties/migrator/PropertiesMigrationReporter.java
@@ -174,7 +174,6 @@ class PropertiesMigrationReporter {
 
 	private Map<String, ConfigurationPropertySource> getPropertySourcesAsMap() {
 		Map<String, ConfigurationPropertySource> map = new LinkedHashMap<>();
-		ConfigurationPropertySources.get(this.environment);
 		for (ConfigurationPropertySource source : ConfigurationPropertySources
 				.get(this.environment)) {
 			map.put(determinePropertySourceName(source), source);
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/bind/PlaceholdersResolver.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/bind/PlaceholdersResolver.java
index 0df74b89d7..54d7275568 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/bind/PlaceholdersResolver.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/bind/PlaceholdersResolver.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySource.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySource.java
index ea9496881b..6afef15822 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySource.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -65,6 +65,15 @@ class AliasedConfigurationPropertySource implements ConfigurationPropertySource
 				return aliasResult;
 			}
 		}
+		for (ConfigurationPropertyName from : getAliases()) {
+			for (ConfigurationPropertyName alias : getAliases().getAliases(from)) {
+				if (name.isAncestorOf(alias)) {
+					if (this.source.getConfigurationProperty(from) != null) {
+						return ConfigurationPropertyState.PRESENT;
+					}
+				}
+			}
+		}
 		return ConfigurationPropertyState.ABSENT;
 	}
 
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameAliases.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameAliases.java
index f668bae35f..7536aa6ea6 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameAliases.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyNameAliases.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@ package org.springframework.boot.context.properties.source;
 
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
@@ -33,7 +34,8 @@ import org.springframework.util.MultiValueMap;
  * @since 2.0.0
  * @see ConfigurationPropertySource#withAliases(ConfigurationPropertyNameAliases)
  */
-public final class ConfigurationPropertyNameAliases {
+public final class ConfigurationPropertyNameAliases
+		implements Iterable<ConfigurationPropertyName> {
 
 	private final MultiValueMap<ConfigurationPropertyName, ConfigurationPropertyName> aliases = new LinkedMultiValueMap<>();
 
@@ -74,4 +76,9 @@ public final class ConfigurationPropertyNameAliases {
 				.findFirst().orElse(null);
 	}
 
+	@Override
+	public Iterator<ConfigurationPropertyName> iterator() {
+		return this.aliases.keySet().iterator();
+	}
+
 }
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/codec/CodecCustomizer.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/codec/CodecCustomizer.java
index d0a5d73cac..182f3c254b 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/codec/CodecCustomizer.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/codec/CodecCustomizer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySourceTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySourceTests.java
index ca9e4e34e5..8d4d15a527 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySourceTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/context/properties/source/AliasedConfigurationPropertySourceTests.java
@@ -16,6 +16,8 @@
 
 package org.springframework.boot.context.properties.source;
 
+import java.util.Collections;
+
 import org.junit.Test;
 import org.mockito.Answers;
 
@@ -111,6 +113,16 @@ public class AliasedConfigurationPropertySourceTests {
 				.isEqualTo(ConfigurationPropertyState.PRESENT);
 	}
 
+	@Test
+	public void containsDescendantOfWhenPresentInAliasShouldReturnPresent() {
+		ConfigurationPropertySource source = new MapConfigurationPropertySource(
+				Collections.singletonMap("foo.bar", "foobar"));
+		ConfigurationPropertySource aliased = source
+				.withAliases(new ConfigurationPropertyNameAliases("foo.bar", "baz.foo"));
+		assertThat(aliased.containsDescendantOf(ConfigurationPropertyName.of("baz")))
+				.isEqualTo(ConfigurationPropertyState.PRESENT);
+	}
+
 	private Object getValue(ConfigurationPropertySource source, String name) {
 		ConfigurationProperty property = source
 				.getConfigurationProperty(ConfigurationPropertyName.of(name));