Add users individually or in bulk to Office 365 – BEMO Docs

The people on your team each need a user account before they can sign in and access Office 365. The easiest way to add user accounts is to add them one at a time in the Microsoft 365 admin center or in bulk.

Use the new admin center to add users

The new admin center is available to all Microsoft 365 admins. You can opt in by selecting the Try the new admin center toggle located at the top of the Home page. For more information, see About the new Microsoft 365 admin center.

Go to the admin center at https://admin.microsoft.com.
Go to Users > Active users, and select Add a user.
In the Set up the basics pane, fill in the following information, and then select Next.

Name Fill in first, last, display name, and username.
Domain For example, if the user's username is Jakob, and his domain is contoso.com, he'll sign in to Office 365 by typing jakob@contoso.com.
Password settings Choose to the use auto-generated password or create your own strong password for the user.
- They'll need to change their password after 90 days. Or you can choose to Require this user to change their password when they first sign in.
- Choose whether you want to send the password in an email when the user has been added.

In the Assign product licenses pane, select the location and the appropriate license for the user. If you don't have any licenses available, you can still add a user and buy additional licenses. Select Next.
In the Optional settings page, expand Roles if you want to make this user an admin, and expand Profile info if you want to add additional information about the user.
Select Next, review your new user's settings, make any changes you like, and then select Finish adding.

Use the old admin center to add users

Go to the admin center at https://admin.microsoft.com.

Go to the admin center at https://portal.office.de/adminportal.

Go to the admin center at https://portal.partner.microsoftonline.cn.

Go to Users > Active users, and select Add a user.

In the New user pane, fill in the following information. Select Add when you are done.

Name Fill in first, last, display name, and user name.
Domain For example, if the user's username is Jakob, and his domain is contoso.com, he'll sign in to Office 365 by typing jakob@contoso.com.
Contact information Expand to fill in a mobile phone number, address, and so on.
Password Use the auto-generated password or expand to specify a strong password for the user.

They'll need to change their password after 90 days. Or you can choose to Make this user change their password when they first sign in.
Roles Expand if you need to make this user an admin.
Product licenses Expand this section and select the appropriate license. If you don't have any licenses available, you can still add a user and buy additional licenses.

After you add a user, you'll get an email notification from the Microsoft Online Services Team. The email will contain the person's Office 365 user ID and password so they can sign in to Office 365. You need to tell your new user about their Office 365 sign-in information. Use your normal process for communicating new passwords.

Note

If you create users by migrating mailboxes, you will need to activate Office 365 user accounts by assigning licenses. If you don't assign a license to a user, their mailbox will be disabled after a grace period of 30 days. See how to assign licenses to users using the Microsoft 365 admin center.

Video: Add and manage users in the admin center

Next steps

Share the Employee quick start guide with your new users to set things up, like Office on a PC or Mac and Office mobile apps.

Have hundreds or thousands of users to add?

To add multiple users at the same time, follow these steps:

Use a spreadsheet to add people in bulk. See Add several users at the same time.
Automate adding accounts and assigning licenses. See Create user accounts with Office 365 PowerShell. Choose this method if you're already familiar with using Windows PowerShell cmdlets.
Using ActiveDirectory? Set up directory synchronization for Office 365. Use the Azure AD Connect tool to replicate Active Directory user accounts (and other Active Directory objects) in Office 365. The sync only adds the user accounts. You will need to assign licenses to the synced users before they can use email and other Office apps.
Migrating from Exchange? Ways to migrate multiple email accounts to Office 365. When you migrate multiple mailboxes to Office 365 by using either cutover, staged, or a hybrid Exchange method, you will add users automatically as part of the migration. The migration only adds user accounts. You will need to assign licenses to the users before they can use email and other Office apps.

Reference: https://docs.microsoft.com/en-us/office365/admin/add-users/add-users?view=o365-worldwide