diff --git a/apps/server/src/shared/repo/mongo.patterns.ts b/apps/server/src/shared/repo/mongo.patterns.ts
index 572fc9819bc..0cee8dbcf3b 100644
--- a/apps/server/src/shared/repo/mongo.patterns.ts
+++ b/apps/server/src/shared/repo/mongo.patterns.ts
@@ -4,5 +4,5 @@ export class MongoPatterns {
 	 * Used to remove all non-language characters except numbers, whitespace or minus.
 	 */
 	static REGEX_MONGO_LANGUAGE_PATTERN_WHITELIST =
-		/[^\-_\w\d áàâäãåçéèêëíìîïñóòôöõúùûüýÿæœÁÀÂÄÃÅÇÉÈÊËÍÌÎÏÑÓÒÔÖÕÚÙÛÜÝŸÆŒ]/gi;
+		/[^\-_\w\d áàâäãåçéèêëíìîïñóòôöõúùûüýÿæœÁÀÂÄÃÅÇÉÈÊËÍÌÎÏÑÓÒÔÖÕÚÙÛÜÝŸÆŒß]/gi;
 }
diff --git a/apps/server/src/shared/repo/user/user.repo.integration.spec.ts b/apps/server/src/shared/repo/user/user.repo.integration.spec.ts
index d499efc45e8..4dba77016ac 100644
--- a/apps/server/src/shared/repo/user/user.repo.integration.spec.ts
+++ b/apps/server/src/shared/repo/user/user.repo.integration.spec.ts
@@ -371,6 +371,31 @@ describe('user repo', () => {
 			// id do not exist
 			await expect(repo.findForImportUser(school)).rejects.toThrowError();
 		});
+
+		describe('when the first or lastname of the user contains "ß"', () => {
+			describe('when the name filter query is exactly the first or lastname of the user', () => {
+				const setup = async () => {
+					const school = schoolEntityFactory.build();
+					const user = userFactory.build({ school, firstName: 'Martin', lastName: 'Beißner' });
+					await em.persistAndFlush([user]);
+					em.clear();
+
+					return {
+						school,
+						user,
+					};
+				};
+
+				it('should return the searched user', async () => {
+					const { school, user } = await setup();
+
+					const [result, count] = await repo.findForImportUser(school, { name: user.lastName });
+
+					expect(count).toEqual(1);
+					expect(result.map((u) => u.id)).toContain(user.id);
+				});
+			});
+		});
 	});
 
 	describe('findByEmail', () => {
diff --git a/apps/server/src/shared/repo/user/user.scope.spec.ts b/apps/server/src/shared/repo/user/user.scope.spec.ts
index 484c5958d6d..6957c9acb5c 100644
--- a/apps/server/src/shared/repo/user/user.scope.spec.ts
+++ b/apps/server/src/shared/repo/user/user.scope.spec.ts
@@ -158,6 +158,26 @@ describe('UserScope', () => {
 				expect(scope.query).toEqual({});
 			});
 		});
+
+		describe('when a name contains "ß"', () => {
+			const setup = () => {
+				const name = 'Beißner';
+
+				return {
+					name,
+				};
+			};
+
+			it('should return scope with added query where first or lastname is given without removing the "ß"', () => {
+				const { name } = setup();
+
+				scope.byName(name);
+
+				expect(scope.query).toEqual({
+					$or: [{ firstName: new RegExp(name, 'i') }, { lastName: new RegExp(name, 'i') }],
+				});
+			});
+		});
 	});
 
 	describe('withDeleted', () => {
@@ -173,7 +193,7 @@ describe('UserScope', () => {
 			it('should add a query that removes deleted users', () => {
 				scope.withDeleted(false);
 
-				expect(scope.query).toEqual({ deletedAt: { $exists: false } });
+				expect(scope.query).toEqual({ $or: [{ deletedAt: { $exists: false } }, { deletedAt: null }] });
 			});
 		});
 	});
diff --git a/apps/server/src/shared/repo/user/user.scope.ts b/apps/server/src/shared/repo/user/user.scope.ts
index 47efd5afe71..884fe970a90 100644
--- a/apps/server/src/shared/repo/user/user.scope.ts
+++ b/apps/server/src/shared/repo/user/user.scope.ts
@@ -51,7 +51,7 @@ export class UserScope extends Scope<User> {
 
 	withDeleted(deleted?: boolean): UserScope {
 		if (!deleted) {
-			this.addQuery({ deletedAt: { $exists: false } });
+			this.addQuery({ $or: [{ deletedAt: { $exists: false } }, { deletedAt: null }] });
 		}
 		return this;
 	}