You can do this through Power Shell. The following link has a video that makes this task easy.
Download and install the Microsoft Online Services Sign-In Assistant for IT Professionals RTW from the Microsoft Download Center.
Download and install the Azure Active Directory Module for Windows PowerShell (64-bit version). The file you are looking for is named “WindowsAzurePowershellGet.3f.3f.3fnew.exe”
I found it on the following page, at the bottom under the heading “PowerShell” and “Windows install”.
Once you install the Active Directory Module you will need to restart your machine. Open the Powershell as an Administrator.
Once you type in the cmdlet: Connect-MsolService , and hit enter you will be prompted for login credentials.
Use the Office 365 admin credentials.
The next line to type in is: Set-MsolUser -UserPrincipalName firstname.lastname@example.org -PasswordNeverExpires $true , hit enter.
You are done.
I hope this helps someone else out there……