If you are the owner of a Microsoft 365 group, you can recover a deleted group by yourself in Outlook.
- On the deleted groups page or People – Outlook (office.com), select the Manage groups > Groups > Deleted.
2. Click on the Restore tab.
If you are the Office 365 Global Administrator, Please follow these steps:
1. Sign in to the Azure portal with a User Administrator account.
2. Browse to Azure Active Directory > Groups, then select Deleted groups
3. Highlight the deleted you want to restore, and then click on Restore group.
