Bulk users attributes update in active directory

Import-Module activedirectory
Import-Csv C:\usrs.csv | ForEach-Object {Set-ADUser -Identity $_.samAccountName -Replace @{Mobile=$_.MobilePhone}}


create usrs.csv with required contents as below and save in C:\
-----
samaccountname,MobilePhone

See all user attributes with below command . (some of which can be included for update. put ";" at the end of above command)
Get-ADUser asif.gohar -Properties *


Example. 2:
Import-Csv C:\usrs.csv | ForEach-Object {
  Set-ADUser -Identity $_.samAccountName -Replace @{
    telephoneNumber=$_.OfficePhone;HomePhone=$_.HomePhone;MobilePhone=$_.MobilePhone}
}

=====================
Other attributes:

Create UsersAll.csv as below and save on E:\ or other drive.
E:\UsersAll.CSV

samAccountName,Title,Department,Office




Import-Csv E:\UsersAll.csv | ForEach-Object {Set-ADUser -Identity $_.samAccountName -title $_.title -department $_.department -office $_.office}


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Update Manager

Import-Csv E:\Managers.csv | ForEach-Object {Set-ADUser -Identity $_.samAccountName -Manager $_.Manager}