How to Undelete the accounts and groups

Please follow the below steps to undelete the groups:-

 Step1: Navigate to System --> Security --> Groups

 Step 2: Select Folder View --> Click on 3 dots on Right Top corner and Click on Change 

Step 3: Change the report view to All folder Items(with Deleted)

 Step 4: In the True section, Right click on the Group --> Select Undelete Group and refresh the Tab

 After performing the above steps, you should be able to undelete the groups.