#Microsoft Office 365 - Reset All Users Passwords in PowerShell - Additional for password never expired

     1.  Install Microsoft Online Services Module for Windows PowerShell

     2.  Run Microsoft Online Services Module for Windows PowerShell as Administrator

     3.  Type Import-Module MSOnline

     

     4.  Type Connect-MsolService -cred $cred

    

     5.  Insert Office365 admin user name and password

      6.  Type Get-Command -Module msonline

     7.  Type Get-msoluser |set-msoluserpassword -newpassword “password” -forcechangepassword $false

     8.  Password will start reset for all users                              

Source: http://onlinehelp.microsoft.com/en-us/Office365-enterprises/hh124998.aspx

additional: Password never expired 

For all users: Type Get-MSOLUser | Set-MsolUser -PasswordNeverExpires $true

For individual user: Type Get-MSOLUser -example@domain.com -PasswordNeverExpires $true -StrongPasswordRequired $true