diff --git a/controllers/courses.js b/controllers/courses.js
index 9dbbf5acd8..f66781c828 100644
--- a/controllers/courses.js
+++ b/controllers/courses.js
@@ -33,6 +33,41 @@ const markSelected = (options, values = []) => options.map((option) => {
 	return option;
 });
 
+// checks for user's 'STUDENT_LIST' permission and filters checked students
+const filterStudents = (ctx, s) => (
+	!ctx.locals.currentUser.permissions.includes('STUDENT_LIST')
+		? s.filter(({ selected }) => selected) : s
+);
+
+const selectedElementIdsToString = (arr = []) => {
+	const txt = arr.filter((obj) => obj.selected).map((obj) => (obj.id !== undefined ? obj.id : obj._id)).join(',');
+	return txt;
+};
+
+const getSyncedElementIds = 	(
+	course,
+	classesAndGroups,
+	classAndGroupIdsOfCourse,
+	teachers,
+	substitutions,
+	students,
+	res,
+) => {
+	const startDate = course.startDate ? timesHelper.formatDate(course.startDate, 'DD.MM.YYYY') : undefined;
+	const untilDate = course.untilDate ? timesHelper.formatDate(course.untilDate, 'DD.MM.YYYY') : undefined;
+
+	const selectedElements = {
+		teachersSelected: selectedElementIdsToString(markSelected(teachers, course.teacherIds)),
+		substitutionSelected: selectedElementIdsToString(markSelected(substitutions, course.substitutionIds)),
+		classesAndGroupsSelected: selectedElementIdsToString(markSelected(classesAndGroups, classAndGroupIdsOfCourse)),
+		studentsSelected: selectedElementIdsToString(filterStudents(res, markSelected(students, course.userIds))),
+		startDate,
+		untilDate,
+	};
+
+	return selectedElements;
+};
+
 const getDefaultRedirectUrl = (courseId) => `/rooms/${courseId}`;
 
 /**
@@ -241,14 +276,18 @@ const editCourseHandler = (req, res, next) => {
 			'#795548',
 		];
 
-		// checks for user's 'STUDENT_LIST' permission and filters checked students
-		const filterStudents = (ctx, s) => (
-			!ctx.locals.currentUser.permissions.includes('STUDENT_LIST')
-				? s.filter(({ selected }) => selected) : s
-		);
-
 		const classAndGroupIdsOfCourse = [...(course.classIds || []), ...(course.groupIds || [])];
 
+		const syncedElementIds = course.syncedWithGroup ? getSyncedElementIds(
+			course,
+			classesAndGroups,
+			classAndGroupIdsOfCourse,
+			teachers,
+			substitutions,
+			students,
+			res,
+		) : {};
+
 		if (req.params.courseId) {
 			if (!_scopePermissions.includes('COURSE_EDIT')) return next(new Error(res.$t('global.text.403')));
 			return res.render('courses/edit-course', {
@@ -260,17 +299,12 @@ const editCourseHandler = (req, res, next) => {
 				course,
 				colors,
 				classesAndGroups: markSelected(classesAndGroups, classAndGroupIdsOfCourse),
-				teachers: markSelected(
-					teachers,
-					course.teacherIds,
-				),
-				substitutions: markSelected(
-					substitutions,
-					course.substitutionIds,
-				),
+				teachers: markSelected(teachers, course.teacherIds),
+				substitutions: markSelected(substitutions, course.substitutionIds),
 				students: filterStudents(res, markSelected(students, course.userIds)),
 				scopePermissions: _scopePermissions,
 				schoolData: res.locals.currentSchoolData,
+				...syncedElementIds,
 			});
 		}
 		return res.render('courses/create-course', {
@@ -379,12 +413,6 @@ const copyCourseHandler = (req, res, next) => {
 
 		course.isArchived = false;
 
-		// checks for user's 'STUDENT_LIST' permission and filters checked students
-		const filterStudents = (ctx, s) => (
-			!ctx.locals.currentUser.permissions.includes('STUDENT_LIST')
-				? s.filter(({ selected }) => selected) : s
-		);
-
 		res.render('courses/edit-course', {
 			action,
 			method,
@@ -764,6 +792,19 @@ router.patch('/:courseId', async (req, res, next) => {
 			req.body.substitutionIds = [];
 		}
 
+		if (typeof req.body.teacherIds === 'string') {
+			req.body.teacherIds = req.body.teacherIds.split(',');
+		}
+		if (typeof req.body.substitutionIds === 'string') {
+			req.body.substitutionIds = req.body.substitutionIds.split(',');
+		}
+		if (typeof req.body.classIds === 'string') {
+			req.body.classIds = req.body.classIds.split(',');
+		}
+		if (typeof req.body.userIds === 'string') {
+			req.body.userIds = req.body.userIds.split(',');
+		}
+
 		const startDate = timesHelper.dateStringToMoment(req.body.startDate);
 		const untilDate = timesHelper.dateStringToMoment(req.body.untilDate);
 
diff --git a/views/courses/edit-course.hbs b/views/courses/edit-course.hbs
index f99da310cf..a302813502 100644
--- a/views/courses/edit-course.hbs
+++ b/views/courses/edit-course.hbs
@@ -137,15 +137,17 @@
 
 				<div class="form-group">
 					<label for="teacherId">{{$t "administration.global.label.teachingTeacher"}}</label>
-
-					<select id="teacherId" name="teacherIds[]" required multiple data-placeholder="{{$t "courses.global.input.chooseTeacher"}}"
-						{{#if course.isArchived}}disabled{{/if}}>
-						{{#each teachers}}
-							<option value="{{this._id}}" {{#if this.selected}}selected{{/if}} {{#if this.isHidden}}hidden{{/if}}>
-									{{this.lastName}}, {{this.firstName}}{{#if this.outdatedSince}} ~~{{/if}}
-							</option>
-						{{/each}}
-					</select>
+                    <select id="teacherId" name="teacherIds[]" required multiple data-placeholder="{{$t "courses.global.input.chooseTeacher"}}"
+                            {{#ifCond course.isArchived '||' course.syncedWithGroup}}disabled{{/ifCond}}>
+                        {{#each teachers}}
+                            <option value="{{this._id}}" {{#if this.selected}}selected{{/if}} {{#if this.isHidden}}hidden{{/if}}>
+                                {{this.lastName}}, {{this.firstName}}{{#if this.outdatedSince}} ~~{{/if}}
+                            </option>
+                        {{/each}}
+                    </select>
+                    {{#if course.syncedWithGroup}}
+                        <input type="hidden" id="teacherIdSync" name="teacherIds" value="{{teachersSelected}}">
+                    {{/if}}
 					<span class="small course-validation-error" id="courseTeacherErr">
 					{{$t "courses.global.input.noCourseTeacher"}}</span>
 				</div>
@@ -153,12 +155,15 @@
 				<div class="form-group">
 					<label for="substituteTeacher">{{$t "courses._course.edit.label.substitute"}}</label>
 					<select id="substituteTeacher" name="substitutionIds[]" multiple data-placeholder="{{$t "courses.global.input.chooseTeacher"}}"
-						{{#if course.isArchived}}disabled{{/if}}>
+                        {{#ifCond course.isArchived '||' course.syncedWithGroup}}disabled{{/ifCond}}>
 						{{#each substitutions}}
 							<option value="{{this._id}}" {{#if this.selected}}selected{{/if}} {{#if this.isHidden}}hidden{{/if}}>
 								{{this.lastName}}, {{this.firstName}}{{#if this.outdatedSince}} ~~{{/if}}
 							</option>
 						{{/each}}
+                        {{#if course.syncedWithGroup}}
+                                <input type="hidden" id="substituteTeacherSync" name="substitutionIds" value="{{substitutionSelected}}">
+                        {{/if}}
 					</select>
 				</div>
 
@@ -166,7 +171,7 @@
 					<label for="classId">{{$t "global.headline.classes"}} <small>{{$t "administration.global.label.afterSavingAllStudentsAdded"}}</small></label>
 
 					<select id="classId" name="classIds[]" multiple data-placeholder="{{$t "courses.global.input.selectClasses"}}"
-						{{#if course.isArchived}}disabled{{/if}}>
+                        {{#ifCond course.isArchived '||' course.syncedWithGroup}}disabled{{/ifCond}}>
 						{{#each classesAndGroups}}
 							<option value="{{#if this._id}}{{this._id}}{{else}}{{this.id}}{{/if}}" {{#if this.selected}}selected{{/if}}>
                                 {{#if (getConfig "FEATURE_GROUPS_IN_COURSE_ENABLED")}}
@@ -193,18 +198,24 @@
 							</option>
 						{{/each}}
 					</select>
+                    {{#if course.syncedWithGroup}}
+                            <input type="hidden" id="classIdSync" name="classIds" value="{{classesAndGroupsSelected}}">
+                    {{/if}}
 				</div>
 
 				<div class="form-group">
 					<label for="studentsId">{{$t "administration.global.label.studentParticipants"}}</label>
 					<select id="studentsId" name="userIds[]" multiple data-placeholder="{{$t "courses.global.input.selectStudents"}}"
-						{{#if course.isArchived}}disabled{{/if}}>
+                        {{#ifCond course.isArchived '||' course.syncedWithGroup}}disabled{{/ifCond}}>
 						{{#each students}}
 							<option value="{{this._id}}" {{#if this.selected}}selected{{/if}} {{#if this.isHidden}}hidden{{/if}}>
 									{{this.lastName}}, {{this.firstName}}{{#if this.outdatedSince}} ~~{{/if}}
 							</option>
 						{{/each}}
 					</select>
+                    {{#if course.syncedWithGroup}}
+                            <input type="hidden" id="studentsIdSync" name="userIds" value="{{studentsSelected}}">
+                    {{/if}}
 				</div>
 
 				<label>{{$t "administration.global.label.chooseDate"}}</label>
@@ -212,12 +223,18 @@
 					<label>{{$t "administration.global.label.timeSpan"}}</label>
 					<div class="row">
 						<div class="form-group col-md-6">
-                            {{> "lib/forms/form-date-input" label=($t "global.label.from") id="startDate" value=course.startDate disabled=@root.course.isArchived ariaLabel=($t "administration.global.label.chooseDate") }}
+                            {{> "lib/forms/form-date-input" label=($t "global.label.from") id="startDate" value=course.startDate disabled=(isCond @root.course.isArchived '||' @root.course.syncedWithGroup) ariaLabel=($t "administration.global.label.chooseDate") }}
 						</div>
+                        {{#if course.syncedWithGroup}}
+                            <input type="hidden" id="startDateSync" name="startDate" value="{{startDate}}">
+                        {{/if}}
 
 						<div class="form-group col-md-6">
-                            {{> "lib/forms/form-date-input" label=($t "global.label.to") id="untilDate" value=course.untilDate disabled=@root.course.isArchived ariaLabel=($t "administration.global.label.chooseDate") }}
+                            {{> "lib/forms/form-date-input" label=($t "global.label.to") id="untilDate" value=course.untilDate disabled=(isCond @root.course.isArchived '||' @root.course.syncedWithGroup) ariaLabel=($t "administration.global.label.chooseDate") }}
 						</div>
+                        {{#if course.syncedWithGroup}}
+                            <input type="hidden" id="untilDateSync" name="untilDate" value="{{untilDate}}">
+                        {{/if}}
 					</div>
 
 					<table width="100%" cellpadding="5px">