How to Add the Global Administrator Role in Microsoft 365
Question details
The user needs to assign the Global Administrator role to an existing user account to grant them full administrative access.

- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Managing user permissions and delegating full administrative access within the Microsoft 365 organization.
- Observed behavior
- The target user requires comprehensive administrative privileges across all Microsoft 365 services to manage settings, users, and subscriptions.
You must already be signed in to the Microsoft 365 Admin Center with an existing Global Administrator account, as standard users or lower-tier administrators do not have the required permissions to assign this role.
Assign the Global Administrator Role via the Admin Center
Use the Active Users list in the Microsoft 365 Admin Center to upgrade an existing user's permissions to Global Administrator.
This is the standard and most direct method for managing user roles. It requires access to the main Microsoft 365 admin portal.
Navigate to https://admin.microsoft.com in your web browser and sign in using your existing Global Administrator credentials.
On the left-hand navigation menu, click on 'Users' to expand the section, and then select 'Active users'.
Scroll through the list or use the search bar to find the user you want to modify. Click on the user's display name to open their account properties flyout pane on the right side of the screen.
In the flyout pane, go to the 'Account' tab. Locate the 'Roles' section and click on the 'Manage roles' link.
Select the 'Admin center access' option, then check the box next to 'Global Administrator'. Click the 'Save changes' button at the bottom to apply the new permissions.

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Frequently Asked Questions
Why can't I see the 'Manage roles' option in my Microsoft 365 Admin Center?
If you do not see the 'Manage roles' option, your current account does not have the necessary permissions (such as Global Administrator or Privileged Role Administrator) to assign administrative roles to other users.
Can I have more than one Global Administrator in my organization?
Yes, you can have multiple Global Administrators. In fact, Microsoft highly recommends having at least two to ensure you are not completely locked out if one account is compromised, loses its password, or faces multifactor authentication issues.
Will the new Global Administrator automatically have access to all user emails?
By default, Global Administrators do not have automatic read access to individual user mailboxes. However, because of their high-level privileges, they possess the ability to grant themselves or others full access to any user's mailbox through the Exchange admin center.
How long does it take for the newly assigned Global Administrator role to take effect?
Typically, role assignments take effect within a few minutes. However, in some cases, the user may need to sign out of all Microsoft 365 portals and sign back in for the new administrative permissions and admin center interface to properly load.




