When any user from the control panel of office 365 gets deleted, then it gets moved into the recycle bin that remain there for 30 days. It is so because if the user gets deleted unintentionally then it can be recovered easily from the recycle bin.
PowerShell is one of the best option, to remove permanently a user from the Office 365. To accomplish the task using PowerShell “Azue Active Directory Module for the PowerShell” should be installed into the Computer.
First of all, you need to connect with the Azure Active Directory. For that, use Command Connect-MsolService and enter the Credentials.
To Completely remove a user from the Recycle Bin use the command Remove_MsolUser as given below
If you wanted to delete all the users, then pipe the output of the Get-MsolUser command into the Remove-MsolUser with the Force Switch as shown below
The method Explained above is for the users who wanted to completely remove a user from the Office 365. In case, if you got struck anywhere, Please let us know. We will try our best to resolve your query.