diff --git a/apps/provisioning_api/lib/Controller/UsersController.php b/apps/provisioning_api/lib/Controller/UsersController.php
index b02d3bb814e95..b0cd9bfb448f9 100644
--- a/apps/provisioning_api/lib/Controller/UsersController.php
+++ b/apps/provisioning_api/lib/Controller/UsersController.php
@@ -235,21 +235,21 @@ public function getDisabledUsersDetails(string $search = '', ?int $limit = null,
 			/* We have to handle offset ourselve for correctness */
 			$tempLimit = ($limit === null ? null : $limit + $offset);
 			foreach ($subAdminOfGroups as $group) {
-				$users = array_merge(
+				$users = array_unique(array_merge(
 					$users,
 					array_map(
 						fn (IUser $user): string => $user->getUID(),
 						array_filter(
-							$group->searchUsers($search, ($tempLimit === null ? null : $tempLimit - count($users))),
+							$group->searchUsers($search),
 							fn (IUser $user): bool => !$user->isEnabled()
 						)
 					)
-				);
+				));
 				if (($tempLimit !== null) && (count($users) >= $tempLimit)) {
 					break;
 				}
 			}
-			$users = array_slice($users, $offset);
+			$users = array_slice($users, $offset, $limit);
 		}
 
 		$usersDetails = [];
diff --git a/apps/provisioning_api/tests/Controller/UsersControllerTest.php b/apps/provisioning_api/tests/Controller/UsersControllerTest.php
index 2d339205fae6f..d5931ef0eba75 100644
--- a/apps/provisioning_api/tests/Controller/UsersControllerTest.php
+++ b/apps/provisioning_api/tests/Controller/UsersControllerTest.php
@@ -219,6 +219,131 @@ public function testGetUsersAsSubAdmin(): void {
 		$this->assertEquals($expected, $this->api->getUsers('MyCustomSearch')->getData());
 	}
 
+	private function createUserMock(string $uid, bool $enabled): MockObject&IUser {
+		$mockUser = $this->getMockBuilder(IUser::class)
+			->disableOriginalConstructor()
+			->getMock();
+		$mockUser
+			->method('getUID')
+			->willReturn($uid);
+		$mockUser
+			->method('isEnabled')
+			->willReturn($enabled);
+		return $mockUser;
+	}
+
+	public function testGetDisabledUsersAsAdmin(): void {
+		$loggedInUser = $this->getMockBuilder(IUser::class)
+			->disableOriginalConstructor()
+			->getMock();
+		$loggedInUser
+			->expects($this->once())
+			->method('getUID')
+			->willReturn('admin');
+		$this->userSession
+			->expects($this->atLeastOnce())
+			->method('getUser')
+			->willReturn($loggedInUser);
+		$this->groupManager
+			->expects($this->once())
+			->method('isAdmin')
+			->willReturn(true);
+		$this->userManager
+			->expects($this->once())
+			->method('getDisabledUsers')
+			->with(3, 0, 'MyCustomSearch')
+			->willReturn([
+				$this->createUserMock('admin', false),
+				$this->createUserMock('foo', false),
+				$this->createUserMock('bar', false),
+			]);
+
+		$expected = [
+			'users' => [
+				'admin' => ['id' => 'admin'],
+				'foo' => ['id' => 'foo'],
+				'bar' => ['id' => 'bar'],
+			],
+		];
+		$this->assertEquals($expected, $this->api->getDisabledUsersDetails('MyCustomSearch', 3)->getData());
+	}
+
+	public function testGetDisabledUsersAsSubAdmin(): void {
+		$loggedInUser = $this->getMockBuilder(IUser::class)
+			->disableOriginalConstructor()
+			->getMock();
+		$loggedInUser
+			->expects($this->once())
+			->method('getUID')
+			->willReturn('subadmin');
+		$this->userSession
+			->expects($this->atLeastOnce())
+			->method('getUser')
+			->willReturn($loggedInUser);
+		$this->groupManager
+			->expects($this->once())
+			->method('isAdmin')
+			->willReturn(false);
+		$firstGroup = $this->getMockBuilder('OCP\IGroup')
+			->disableOriginalConstructor()
+			->getMock();
+		$secondGroup = $this->getMockBuilder('OCP\IGroup')
+			->disableOriginalConstructor()
+			->getMock();
+		$subAdminManager = $this->getMockBuilder('OC\SubAdmin')
+			->disableOriginalConstructor()->getMock();
+		$subAdminManager
+			->expects($this->once())
+			->method('isSubAdmin')
+			->with($loggedInUser)
+			->willReturn(true);
+		$subAdminManager
+			->expects($this->once())
+			->method('getSubAdminsGroups')
+			->with($loggedInUser)
+			->willReturn([$firstGroup, $secondGroup]);
+		$this->groupManager
+			->expects($this->once())
+			->method('getSubAdmin')
+			->willReturn($subAdminManager);
+		$this->groupManager
+			->expects($this->never())
+			->method('displayNamesInGroup');
+
+		$firstGroup
+			->expects($this->once())
+			->method('searchUsers')
+			->with('MyCustomSearch')
+			->willReturn([
+				$this->createUserMock('user1', false),
+				$this->createUserMock('bob', true),
+				$this->createUserMock('user2', false),
+				$this->createUserMock('alice', true),
+			]);
+
+		$secondGroup
+			->expects($this->once())
+			->method('searchUsers')
+			->with('MyCustomSearch')
+			->willReturn([
+				$this->createUserMock('user2', false),
+				$this->createUserMock('joe', true),
+				$this->createUserMock('user3', false),
+				$this->createUserMock('jim', true),
+				$this->createUserMock('john', true),
+			]);
+
+
+		$expected = [
+			'users' => [
+				'user1' => ['id' => 'user1'],
+				'user2' => ['id' => 'user2'],
+				'user3' => ['id' => 'user3'],
+			],
+		];
+		$this->assertEquals($expected, $this->api->getDisabledUsersDetails('MyCustomSearch', 3)->getData());
+	}
+
 
 	public function testAddUserAlreadyExisting(): void {
 		$this->expectException(OCSException::class);