Adding Domains in Bulk to Microsoft 365 using Powershell

Use Microsoft Graph

Install-Module Microsoft.graph

Connect-MgGraph -Scopes "User.ReadWrite.All","Domain.ReadWrite.All"

Importing Bulk Domains to CSV

Import-Csv .\Export.csv | ForEach-Object {New-MgDomain -BodyParameter @{Id=$_.domainname}}

To get verification code for each domain

Get-MgDomain |ForEach-Object {(Get-MgDomainVerificationDnsRecord -DomainId $_.id | Where-Object {$_.RecordType -eq "Txt"}).AdditionalProperties.text}

run get-mgdomain put in a sheet, run this and put in the next column. Saves a lot of time.