How to create user mailboxes using PowerShell in Exchange Server

Click on the “Start” button in the bottom left corner of the screen.
In the search box, type “Exchange Management Shell” and hit enter.

Open the Exchange Management Shell using the steps outlined in my previous response.
Type the following command:

New-Mailbox -UserPrincipalName <UPN> -Alias <Alias> -Name "<Display Name>" -OrganizationalUnit "<OU Path>" -Password (ConvertTo-SecureString -String "<Password>" -AsPlainText -Force) -ResetPasswordOnNextLogon $true


Replace <UPN> with the user’s UPN (e.g. john.doe@contoso.com).
Replace <Alias> with the user’s alias (e.g. jdoe).
Replace <Display Name> with the user’s display name (e.g. John Doe).
Replace <OU Path> with the path of the organizational unit where the mailbox should be created (e.g. “contoso.com/Users”).
Replace <Password> with a strong password for the user.
Press Enter to execute the command.
Verify that the mailbox was created successfully by running the following command: Get-Mailbox -Identity <Alias>
Replace <Alias> with the alias that you specified in step 4.
Press Enter to execute the command.
Review the output to confirm that the mailbox was created and is listed.