Hi @JASID KHAN
According to your description, you may try to perform the following steps to change display name of bulk users:
1.Install PowerShell Office 365.
2.Open an elevated Windows PowerShell command prompt (run Windows PowerShell as an administrator).
3.In the Administrator: Windows PowerShellcommand window, run this command:
Install-Module -Name AzureAD
If prompted about installing a module from an untrusted repository, type Y and press ENTER.
4.Connect to Azure AD for your Office 365 subscription. Run following cmdlet and Sign in with Office 365 global admin center.
Connect-MsolService
5.Create an Excel file with the following format and save in: C:\Users\test1.csv
6.Enter in PowerShell:
Import csv C:\Users\test1.csv |
ForEach-Object{
Set-MsolUser -UserPrincipalName $_.UserPrincipalName -DisplayName $_.DisplayName
}
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