diff --git a/src/main/java/org/olat/course/editor/_i18n/LocalStrings_en.properties b/src/main/java/org/olat/course/editor/_i18n/LocalStrings_en.properties
index d2db977c2b9ef356d41cffb972f60ca380822b52..c42f3cdd79d69b95a6cb4db06781e414473ed1c2 100644
--- a/src/main/java/org/olat/course/editor/_i18n/LocalStrings_en.properties
+++ b/src/main/java/org/olat/course/editor/_i18n/LocalStrings_en.properties
@@ -452,7 +452,7 @@ pbl.intro.warning.header=Important
 pbl.nothing=No modifications to be published. The course is up to date.
 pbl.nothing.button=Back to editor
 pbl.quick.auto=Yes, automatically
-pbl.quick.description=There are unpublished modifications to this course. Would you like to publish them befor closing the editor?
+pbl.quick.description=There are unpublished modifications to this course. Would you like to publish them before closing the editor?
 pbl.quick.manual=Yes, manually
 pbl.quick.no=No
 pbl.quick.title=Publish modifications
diff --git a/src/main/java/org/olat/course/nodes/COCourseNode.java b/src/main/java/org/olat/course/nodes/COCourseNode.java
index cad7cbc885185285c69b1677bcc597b07129b101..c28f52cb9461d573dd90f59504a7d253c3bf6c7e 100755
--- a/src/main/java/org/olat/course/nodes/COCourseNode.java
+++ b/src/main/java/org/olat/course/nodes/COCourseNode.java
@@ -224,14 +224,14 @@ public class COCourseNode extends AbstractAccessableCourseNode {
         isValid = isValid || (StringHelper.containsNonWhitespace(email2AreaCoaches));
         String email2GroupCoaches = (String) getModuleConfiguration().get(COEditController.CONFIG_KEY_EMAILTOCOACHES_GROUP);
         isValid = isValid || (StringHelper.containsNonWhitespace(email2GroupCoaches));
-        isValid = isValid || getModuleConfiguration().getBooleanEntry(COEditController.CONFIG_KEY_EMAILTOCOACHES_ALL);
-        isValid = isValid || getModuleConfiguration().getBooleanEntry(COEditController.CONFIG_KEY_EMAILTOCOACHES_COURSE);
+        isValid = isValid || getModuleConfiguration().getBooleanSafe(COEditController.CONFIG_KEY_EMAILTOCOACHES_ALL, false);
+        isValid = isValid || getModuleConfiguration().getBooleanSafe(COEditController.CONFIG_KEY_EMAILTOCOACHES_COURSE, false);
         String email2AreaParticipants = (String) getModuleConfiguration().get(COEditController.CONFIG_KEY_EMAILTOPARTICIPANTS_AREA);
         isValid = isValid || (StringHelper.containsNonWhitespace(email2AreaParticipants));
         String email2GroupParticipants = (String) getModuleConfiguration().get(COEditController.CONFIG_KEY_EMAILTOPARTICIPANTS_GROUP);
         isValid = isValid || (StringHelper.containsNonWhitespace(email2GroupParticipants));
-        isValid = isValid || getModuleConfiguration().getBooleanEntry(COEditController.CONFIG_KEY_EMAILTOPARTICIPANTS_ALL);
-        isValid = isValid || getModuleConfiguration().getBooleanEntry(COEditController.CONFIG_KEY_EMAILTOPARTICIPANTS_COURSE);
+        isValid = isValid || getModuleConfiguration().getBooleanSafe(COEditController.CONFIG_KEY_EMAILTOPARTICIPANTS_ALL, false);
+        isValid = isValid || getModuleConfiguration().getBooleanSafe(COEditController.CONFIG_KEY_EMAILTOPARTICIPANTS_COURSE, false);
 
         StatusDescription sd = StatusDescription.NOERROR;
         if (!isValid) {
diff --git a/src/main/java/org/olat/group/ui/edit/BusinessGroupMembersController.java b/src/main/java/org/olat/group/ui/edit/BusinessGroupMembersController.java
index 04512361064bb6164426999f62620060c18a447b..0453b5bac69cb27011ad9f382f0cb6761412b122 100644
--- a/src/main/java/org/olat/group/ui/edit/BusinessGroupMembersController.java
+++ b/src/main/java/org/olat/group/ui/edit/BusinessGroupMembersController.java
@@ -88,14 +88,13 @@ public class BusinessGroupMembersController extends BasicController {
 		// set if the checkboxes are checked or not.
 		dmsForm.setDisplayMembers(businessGroup);
 		mainVC.put("displayMembers", dmsForm.getInitialComponent());
-		
-		configForm = new MembershipConfigurationForm (ureq, getWindowControl());
-		configForm.setEnabled(!BusinessGroupManagedFlag.isManaged(businessGroup, BusinessGroupManagedFlag.membersmanagement));
+
+		boolean managed = BusinessGroupManagedFlag.isManaged(businessGroup, BusinessGroupManagedFlag.membersmanagement);
+		configForm = new MembershipConfigurationForm(ureq, getWindowControl(), managed);
 		listenTo(configForm);
 		configForm.setMembershipConfiguration(businessGroup);
 		mainVC.put("configMembers", configForm.getInitialComponent());
 		
-		boolean managed = BusinessGroupManagedFlag.isManaged(businessGroup, BusinessGroupManagedFlag.membersmanagement);
 		SearchMembersParams searchParams = new SearchMembersParams(false, false, false, true, true, true, true);
 		membersController = new MemberListController(ureq, getWindowControl(), businessGroup, searchParams);
 		listenTo(membersController);
diff --git a/src/main/java/org/olat/group/ui/edit/MembershipConfigurationForm.java b/src/main/java/org/olat/group/ui/edit/MembershipConfigurationForm.java
index 6f56f5f4cf6a5c7f8f1cebd89dbee1a11269f5af..df414c32993dab6b1d908ecb32e1a7a145dd0f6d 100644
--- a/src/main/java/org/olat/group/ui/edit/MembershipConfigurationForm.java
+++ b/src/main/java/org/olat/group/ui/edit/MembershipConfigurationForm.java
@@ -43,17 +43,20 @@ public class MembershipConfigurationForm extends FormBasicController {
 
 	private SelectionElement allowToLeaveEl;
 	
+	private final boolean managed;
+	
 	@Autowired
 	private BusinessGroupModule businessGroupModule;
 
 	/**
-	 * @param name
-	 * @param transl
-	 * @param hasPartips
-	 * @param hasOwners
+	 * 
+	 * @param ureq
+	 * @param wControl
+	 * @param managed
 	 */
-	public MembershipConfigurationForm(UserRequest ureq, WindowControl wControl) {
+	public MembershipConfigurationForm(UserRequest ureq, WindowControl wControl, boolean managed) {
 		super(ureq, wControl, LAYOUT_DEFAULT_6_6);
+		this.managed = managed;
 		initForm(ureq);
 	}
 	
@@ -67,10 +70,6 @@ public class MembershipConfigurationForm extends FormBasicController {
 		}
 	}
 
-	public void setEnabled(boolean enabled) {
-		allowToLeaveEl.setEnabled(enabled);
-	}
-
 	@Override
 	protected void formOK(UserRequest ureq) {
 		//
@@ -87,7 +86,9 @@ public class MembershipConfigurationForm extends FormBasicController {
 	protected void initForm(FormItemContainer formLayout, Controller listener, UserRequest ureq) {
 		allowToLeaveEl = uifactory.addCheckboxesHorizontal("allow.leaving", "allow.leaving.group", formLayout, new String[]{"xx"}, new String[]{""});
 		allowToLeaveEl.addActionListener(FormEvent.ONCLICK);
-		if(businessGroupModule.isAllowLeavingGroupOverride()) {
+		if(managed) {
+			allowToLeaveEl.setEnabled(false);
+		} else if(businessGroupModule.isAllowLeavingGroupOverride()) {
 			allowToLeaveEl.setEnabled(true);
 		} else {
 			allowToLeaveEl.setEnabled(false);