How to create a user mailbox

To create an Exchange Online user mailbox, you have three options: using the Microsoft 365 Admin Center, Exchange Online PowerShell, or CoreView. This article will explore these three different methods.

1. Creating a new user mailbox using the M365 Admin Center

You can use the Microsoft 365 Admin Center to create a new user account. When you assign the user account a license for Exchange Online, a mailbox is automatically created for the user. To create new user accounts in the Microsoft 365 admin center, please refer to the Add users and assign licenses at the same time article.

 2. Creating a new user mailbox using PowerShell

For automation or bulk operations, PowerShell can be used to create users and assign licenses.

To create a new licensed user:

# Connect to Microsoft Graph PowerShell.
# Create a new user
New-MgUser -DisplayName "Holly Holt" -UserPrincipalName "hollyh@corp.contoso.com" -AccountEnabled $true -MailNickname "hollyh" -PasswordProfile @{ ForceChangePasswordNextSignIn = $true; Password = "P@ssw0rd" }
# Assign user an Exchange Online license (replace <objectId> and <licenseSkuId>)
Set-MgUserLicense -UserId <objectId> -AddLicenses @{SkuId = "<licenseSkuId>"} -RemoveLicenses @()

• Go to the CoreView app.
• Select ACTIONS > Management actions > Mailbox > Create mailbox.

• Fill all the required details as shown below and submit the form.