Unable to add new members

Question

I should have admin access to add new members but I am unable to as the ADD button is greyed out. How can this be resoved.

Answer 1

Dear @Brzozowski, Martha,

I hope you’re having a good day and thank you for reaching out.

Based on what I know, in SharePoint there are multiple permission levels, and not all “admin” roles allow users to add members to a site. This often causes confusion, especially when the Add button appears greyed out.

To help identify the root cause, could you please help check the following:

1. Your role on this specific SharePoint site: Please confirm whether you are listed as a Site Owner (not just a Member or Visitor). Only Site Owners can add or remove members at the site level.

2. The type of site

Is this a Microsoft 365 group–connected site (for example, connected to a Team)? If so, membership is managed through the Microsoft 365 Group, and only Group Owners can add members. In this case, the Add button in SharePoint may be disabled by design.

3. How your permissions were granted

Are your permissions assigned directly, or inherited through a security group / Microsoft Entra ID group? If access is granted via a group, membership changes usually must be managed at the group level, not from the SharePoint site.

4. Scope of the issue

Does this happen on only this site, or on all SharePoint sites where you expect to add members? This helps determine whether the issue is site‑specific or permission‑related at a broader level.

Additionally, since you have admin permissions, you can add members directly from the Microsoft 365 admin center if the SharePoint Add button is unavailable (common with group‑connected sites).

Go to Admin center > Teams & groups > Active teams and groups > Select the group > Membership tab > Members > Add members > select users > Save.

Or, from Active users: Go to Admin center > Users > Active users > Select the user > Account tab > Manage groups > Assign memberships > choose the group > Save.

This is the recommended approach when the site is connected to a Microsoft 365 Group and membership is managed at the group level rather than directly in SharePoint.

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.  

Once we understand these points, it will be much easier to determine why the Add button is disabled and what steps are needed to resolve it.

I’ll be happy to continue helping once you share a bit more detail.

Warm regards, 

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".    

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.   

Answer 2

In SharePoint and Microsoft 365, an Add button (or similar membership/permissions controls) is typically greyed out when the signed-in account does not have sufficient permissions, even if it is expected to have admin access.

Based on the provided context, use these checks and fixes:

1. Verify admin role in Microsoft 365
   To add members to Microsoft 365 groups via the admin center, the account must be one of:
   • Exchange administrator, or
   • Groups administrator, or
   • User administrator
   If the account is missing these roles, the membership controls can be disabled. An existing global/admin user must assign the correct role.
2. Add members from the Microsoft 365 admin center
   Once the correct role is confirmed:
   • Go to Admin center → Active groups.
   • Select the group.
   • On the Membership tab, choose Members → Add members and select users, then Save.
   Alternatively, from Active users:
   • Select the user.
   • On the Account tab, select Manage groups → Assign memberships, choose the group, then Save.
   If these options are still greyed out, it indicates the account still lacks the required admin role.
3. Check SharePoint permissions if the issue is on a SharePoint site
   In SharePoint, ribbon buttons and membership/permissions controls are disabled when the user lacks the necessary site permissions. Even if the user believes they are an admin, they must actually be:
   • A site collection administrator, or
   • In a group (such as Owners) with Full Control on that site.
   If permissions are insufficient, the Add or New buttons for users/groups will be greyed out. A current site collection admin or global admin must grant the correct SharePoint permissions.
4. Consider group nesting limitations
   If trying to add a group as a member of a Microsoft 365 group, note that nesting is not supported: an existing Distribution List or Microsoft 365 group cannot be added as a member of another Microsoft 365 group. In such cases, the UI may prevent adding that object, and individual users must be added instead.

If, after confirming the correct admin role and SharePoint permissions, the Add button remains greyed out, the tenant’s global admin or SharePoint admin should review the exact role assignments and site/group permissions, as only they can correct misconfigurations that disable these controls.

---

References:

• Add or remove members from Microsoft 365 groups using the admin center
• Why SharePoint ribbon buttons are unavailable