Change User Principal Name equals Email Address Automation

Change_UPN_equals_Email.ps1

# NOTE : Before running the script run below commands to check which are the mailboxes it will apply to 
# Get-Mailbox -ResultSize Unlimited | Where-Object {$_.Primarysmtpaddress -ne $_.UserPrincipalname}
# Get-Mailbox -ResultSize Unlimited | Where-Object {$_.Primarysmtpaddress -ne $_.UserPrincipalname} | ForEach-Object {Set-Mailbox $_.identity -UserPrincipalName $_.Primarysmtpaddress -whatif}




# Include Exchange Powershell Module
Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn

#Lists All Mailboxes
#Checks Email and UPN are same
#Lists which are not email
#Applies UPN Matching email

Get-Mailbox -ResultSize Unlimited | Where-Object {$_.Primarysmtpaddress -ne $_.UserPrincipalname} | ForEach-Object {Set-Mailbox $_.identity -UserPrincipalName $_.Primarysmtpaddress}

# Exit Exchange Powershell Module
Remove-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn