Hello @長尾 春香 ,
Thank you for reaching out to Microsoft QnA platform. I would like to confirm that Microsoft Entra ID portal only supports creation and management of Security and Microsoft 365 Groups.
For more information you can review following documentation and screenshot:
- Documenation Link: https://learn.microsoft.com/en-us/entra/fundamentals/concept-learn-about-groups#what-to-know-before-creating-a-group
With regards to Mail enabled Security Groups or Security Groups with Email you would need to create and manage this security groups from Exchange Admin center or Microsoft 365 Admin Center. For more information review following link: https://learn.microsoft.com/en-us/exchange/recipients-in-exchange-online/manage-mail-enabled-security-groups.
I hope this answer helps to resolve your issue. Please "Accept the answer" if the information helped you. This will help us and others in the community as well.