How to set UPN using format firstname.lastname@domain.com in Office 365

Introduction

This script will set UPN using format firstname.lastname@domain.com in Office 365

Scenarios

This script will set UPN using format firstname.lastname@domain.com in Office 365

Prerequisites
This script requires Windows Azure Active Directory Module for Windows PowerShell. Please download and install the package. This script cannot work correctly without this package.

Script

You can use this script in the following way.

1. Open Windows PowerShell.

2. Type the one command< Script Path> at the Windows PowerShell Console.
For example, type C:\Script\ ChangeUPNtoFirst.LastO365.ps1

Here are some code snippets for your references.

Foreach($User in $ConvertList)
{
    Set-MsolUserPrincipalName -UserPrincipalName $User.PreviousName -NewUserPrincipalName $User.NewName
}

Foreach($User in $ConvertList)
{
    Set-MsolUserPrincipalName -UserPrincipalName $User.PreviousName -NewUserPrincipalName $User.NewName
}

Examples

Example: set UPN using format firstname.lastname@domain.com in Office 365  

The sample is showed below
ChangeUPNtoFirst.LastO365.ps1 -Credential $Credential  - ReportPath "C\Report" – FileName "NamechangingReport.csv"
Result Screenshot:

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