How to create Dynamic Distribution List based on email domain

Steps:

1. Run PowerShell as an Administrator.

2. Install Exchange Online Module if it is not installed by running the below cmdlet.

Install-Module -Name ExchangeOnlineManagement

3. Now import the module by running the below cmdlet.

Import-Module ExchangeOnlineManagement

Note: If the module is already installed then skip steps 2 and 3.

4. Now run the below cmdlet to create a new distribution list.

New-DynamicDistributionGroup -name "distribution list name" -RecipientFilter "(RecipientTypeDetails -eq 'UserMailbox') -and (WindowsLiveID -eq '*@domain name')"

5. Now you can check the membership by running the below cmdlet.

Get-DynamicDistributionGroup -Identity distribution list name | fl