How do I set up my Global admin ID for my tenant so that I can access my professional email id?

Mohit Agarwal 0 Reputation points
2026-09-11T11:38:38.75+00:00

I need to get this set up, so that I can send some approval mails from my global id email id. how do I get it set up?

Microsoft 365 and Office | Subscription, account, billing | For business | Windows
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  1. AI answer

    2026-09-11T11:38:58.9666667+00:00

    To set up the Global Administrator ID for a Microsoft 365 tenant and use it for professional email, use this process:

    1. Create or identify the admin account for the tenant.
      • Each Microsoft 365 tenant has a user ID for each account.
      • The first admin account is typically created with the default tenant domain, such as ******@tenant.onmicrosoft.com.
      • That account can be the Global Administrator for the tenant.
    2. If the tenant is new, create the Global Admin account during tenant setup.
      • During setup, enter the admin username, domain name, and password.
      • Record that username and password because this becomes the admin sign-in account.
    3. Add and verify the organization’s custom domain if professional email should use the company domain instead of the default onmicrosoft.com address.
      • Microsoft 365 creates the default onmicrosoft.com domain automatically.
      • After setup, add the custom domain to the tenant.
      • Once the custom domain is verified, the admin account’s username and email address can be changed from the onmicrosoft.com address to the professional domain address.
    4. Use the alternate email address if the admin ID is forgotten.
      • During sign-up, Microsoft 365 requires an alternate email address not connected to the tenant.
      • Microsoft sends an introductory email there that includes the user ID and the sign-in URL.
      • If the Global Admin user ID is forgotten, check that introductory email.
    5. If the goal is to assign or confirm the Global Administrator role for a user:
      • In the Microsoft 365 admin center, go to Roles > Role assignments.
      • Select Global Administrator.
      • On the Assigned tab, select Add users.
      • Enter the user’s display name or username, select the user, and choose Add.

    Important detail:

    • The onmicrosoft.com admin account is expected at first and acts as the default routing domain for the tenant.
    • To send approval emails from a professional address, the custom domain must be added and verified first, then the admin account can use that domain for its username and email address.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Heimerdinger 295 Reputation points Independent Advisor
    2026-09-11T11:52:23.6933333+00:00

    Hi @Mohit Agarwal,

    Based on your description, the Global Administrator account is normally created during the Microsoft 365 Business subscription purchase and tenant setup process. It is not something that usually needs to be created separately afterward.

    To better understand your situation, could you clarify a few points?

    • Do you currently have access to the Microsoft 365 Admin Center?
    • Are you trying to recover an existing Global Administrator account, or create a new one?
    • Can you access your professional email with another account?
    • If you receive an error message, could you provide a screenshot of the exact error?

    However, if you already have access to the Microsoft 365 Admin Center for your tenant, you can create another administrator account by following these steps:

    1. Sign in to the Microsoft 365 Admin Center.
    2. Go to Users > Active users.
    3. Select Add a user.
    4. Enter the user's name, display name, and username.
    5. Assign an available license if the account needs access to services such as Exchange Online email.
    6. Under Roles, select Admin center access and assign the Global Administrator role.
    7. Complete the wizard and save the account details.
    8. Sign in with the newly created administrator account and access Outlook.

    The answers to these questions will help determine whether this is an account access issue, a licensing issue, or an email mailbox configuration issue.

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