diff --git a/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/messages/audit-service.properties b/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/messages/audit-service.properties
index b066c5d93d..9f376f0cf1 100644
--- a/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/messages/audit-service.properties
+++ b/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/messages/audit-service.properties
@@ -7,6 +7,7 @@ rm.audit.create-person=Create User
 rm.audit.delete-person=Delete User
 rm.audit.create-userGroup=Create User Group
 rm.audit.delete-userGroup=Delete User Group
+rm.audit.addMember=Add To User Group
 rm.audit.linkTo=Link to
 rm.audit.moveTo=Move to
 rm.audit.copyTo=Copy to
diff --git a/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/rm-audit-context.xml b/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/rm-audit-context.xml
index 2a62aa660c..45a804bfd1 100644
--- a/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/rm-audit-context.xml
+++ b/rm-community/rm-community-repo/config/alfresco/module/org_alfresco_module_rm/rm-audit-context.xml
@@ -78,6 +78,12 @@
       <property name="label" value="rm.audit.delete-userGroup" />
    </bean>
 
+   <bean id="audit-event.addMember" parent="audit-event" class="org.alfresco.module.org_alfresco_module_rm.audit.event.AddToUserGroupAuditEvent">
+      <property name="nodeService" ref="nodeService" />
+      <property name="name" value="Add To User Group"/>
+      <property name="label" value="rm.audit.addMember"/>
+   </bean>
+
    <bean id="audit-event.login-success" parent="audit-event" class="org.alfresco.module.org_alfresco_module_rm.audit.event.AuditEvent">
       <property name="name" value="Login.Success"/>
       <property name="label" value="rm.audit.login-succeeded"/>
diff --git a/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/AddToUserGroupAuditEvent.java b/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/AddToUserGroupAuditEvent.java
new file mode 100644
index 0000000000..d8a0422329
--- /dev/null
+++ b/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/AddToUserGroupAuditEvent.java
@@ -0,0 +1,83 @@
+/*
+ * #%L
+ * Alfresco Records Management Module
+ * %%
+ * Copyright (C) 2005 - 2018 Alfresco Software Limited
+ * %%
+ * This file is part of the Alfresco software.
+ * -
+ * If the software was purchased under a paid Alfresco license, the terms of
+ * the paid license agreement will prevail.  Otherwise, the software is
+ * provided under the following open source license terms:
+ * -
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * -
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ * -
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ * #L%
+ */
+
+package org.alfresco.module.org_alfresco_module_rm.audit.event;
+
+import static org.alfresco.repo.policy.Behaviour.NotificationFrequency.EVERY_EVENT;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.alfresco.model.ContentModel;
+import org.alfresco.repo.node.NodeServicePolicies.OnCreateChildAssociationPolicy;
+import org.alfresco.repo.policy.annotation.Behaviour;
+import org.alfresco.repo.policy.annotation.BehaviourBean;
+import org.alfresco.repo.policy.annotation.BehaviourKind;
+import org.alfresco.service.cmr.repository.ChildAssociationRef;
+import org.alfresco.service.cmr.repository.NodeService;
+import org.alfresco.service.namespace.QName;
+
+/**
+ * Add an authority to a user group.
+ *
+ * @author Tom Page
+ * @since 2.7
+ */
+@BehaviourBean(defaultType = "cm:authorityContainer")
+public class AddToUserGroupAuditEvent extends AuditEvent implements OnCreateChildAssociationPolicy
+{
+    /** Node Service */
+    private NodeService nodeService;
+
+    /**
+     * Sets the node service
+     *
+     * @param nodeService nodeService to set
+     */
+    public void setNodeService(NodeService nodeService)
+    {
+        this.nodeService = nodeService;
+    }
+
+    /** Behaviour to audit adding an authority to a user group. */
+    @Override
+    @Behaviour(kind = BehaviourKind.ASSOCIATION, notificationFrequency = EVERY_EVENT, assocType = "cm:member")
+    public void onCreateChildAssociation(ChildAssociationRef childAssocRef, boolean isNewNode)
+    {
+        Map<QName, Serializable> auditProperties = new HashMap<>();
+        auditProperties.put(ContentModel.PROP_AUTHORITY_NAME,
+                    nodeService.getProperty(childAssocRef.getChildRef(), ContentModel.PROP_AUTHORITY_NAME));
+        auditProperties.put(ContentModel.PROP_USERNAME,
+                    nodeService.getProperty(childAssocRef.getChildRef(), ContentModel.PROP_USERNAME));
+        // (Ab)use link destination property here, as it vaguely sounds like where the authority ends up.
+        auditProperties.put(ContentModel.PROP_LINK_DESTINATION,
+                    nodeService.getProperty(childAssocRef.getParentRef(), ContentModel.PROP_AUTHORITY_NAME));
+
+        recordsManagementAuditService.auditEvent(childAssocRef.getChildRef(), getName(), null, auditProperties);
+    }
+}
diff --git a/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/CreateUserGroupAuditEvent.java b/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/CreateUserGroupAuditEvent.java
index a80e8aab54..177bf0c75b 100644
--- a/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/CreateUserGroupAuditEvent.java
+++ b/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/CreateUserGroupAuditEvent.java
@@ -61,6 +61,7 @@ public class CreateUserGroupAuditEvent extends AuditEvent implements OnCreateNod
         this.nodeService = nodeService;
     }
 
+    /** Behaviour to audit user group creation. */
     @Override
     @Behaviour(kind = BehaviourKind.CLASS, type = "cm:authorityContainer")
     public void onCreateNode(ChildAssociationRef childAssocRef)
diff --git a/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/DeleteUserGroupAuditEvent.java b/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/DeleteUserGroupAuditEvent.java
index 810aca345d..ce4d2f6bf9 100644
--- a/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/DeleteUserGroupAuditEvent.java
+++ b/rm-community/rm-community-repo/source/java/org/alfresco/module/org_alfresco_module_rm/audit/event/DeleteUserGroupAuditEvent.java
@@ -63,7 +63,7 @@ public class DeleteUserGroupAuditEvent extends AuditEvent implements BeforeDelet
     }
 
     /**
-     * Behaviour that will audit user deletion
+     * Behaviour that will audit user group deletion
      *
      * @param nodeRef the node to be deleted
      */