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Learn moreManage site admins
This article describes how a SharePoint Administrator and above in Microsoft 365 can add and remove site admins (previously called "site collection admins"). If you're an owner of a communication site, or a site that belongs to a Microsoft 365 group, see Manage your SharePoint site settings for info about giving people access to your site. If you're an admin for a classic site, see Manage your SharePoint site settings.
Note
If you're a Global Administrator and want info about assigning other users the SharePoint Administrator role in Microsoft 365, see Assigning admin permissions.Microsoft recommends that you use roles with the fewest permissions. Using lower permissioned accounts helps improve security for your organization. Global Administrator is a highly privileged role that should be limited to emergency scenarios when you can't use an existing role.
By using the new SharePoint admin center, you can change the owners for sites that use the new team site and communication site templates. You can also add and remove group members in the Microsoft 365 admin center. For info, see Add or remove members from Microsoft 365 groups.
Go to Active sites in the SharePoint admin center, and sign in with an account that has admin permissions for your organization.
Note
If you have Office 365 operated by 21Vianet (China), sign in to the Microsoft 365 admin center, then browse to the SharePoint admin center and open the Active sites page.
In the left column, select a site.
Select Membership on the command bar to open the details panel. For a group-connected team site, you can add and remove group owners and additional site admins. For other sites, you can add and remove site admins and change the primary admin. Note that if you remove a person as a primary admin, they will still be listed as an additional admin. For info about each role, see About site permissions.
In the details panel, you can add or remove the owners, members, site admins, site owners, site members, and site visitors.
Additional resources
Training
Module
Manage SharePoint Online by using Windows PowerShell - Training
Manage SharePoint Online by using Windows PowerShell
Certification
Microsoft 365 Certified: Administrator Expert - Certifications
If you’re an administrator who deploys and manages Microsoft 365 and performs Microsoft 365 tenant-level implementation and administration of cloud and hybrid environments, this certification is designed for you.
Documentation
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Manage sites in the SharePoint admin center - SharePoint in Microsoft 365
In this article, you learn about tasks you can perform on the Active sites page of the SharePoint admin center, such as view site details, view and change site membership, and change a site's hub association.
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About the SharePoint Administrator role in Microsoft 365 - SharePoint in Microsoft 365
Learn about the SharePoint Administrator role in Microsoft 365. SharePoint Administrators administer SharePoint and OneDrive in your organization.
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Manage site creation in SharePoint - SharePoint in Microsoft 365
In this article, you'll learn how to allow or prevent users from creating their own sites in SharePoint.