Install-Module -Name ExchangeOnlineManagement -RequiredVersion 2.0.5
Install-Module -Name MSOnline
Connect-ExchangeOnline -UserPrincipalName <Administator Email Address>
Connect-MsolService
Import-Csv <Path to CSV File> | foreach {Set-MsolUser -UserPrincipalName $_.UserPrincipalName -City $_.City -Country $_.Country -Department $_.Department -DisplayName $_.DisplayName -Fax $_.Fax -FirstName $_.FirstName -LastName $_.LastName -MobilePhone $_.MobilePhone -Office $_.Office -PhoneNumber $_.PhoneNumber -PostalCode $_.PostalCode -PreferredLanguage $_.PreferredLanguage -State $_.State -StreetAddress $_.StreetAddress -Title $_.Title -UsageLocation $_.UsageLocation}