I am unable to add family member to my family subscription

Use this checklist to add the family member successfully:

1. Sign in with the family organizer account at https://account.microsoft.com/family.
2. Select Add a family member.
3. Choose their role:
   • Member for a child
   • Organizer for an adult
4. Enter their email address or mobile number and select Next.
5. Send the invitation.
6. Have the invited person open the invitation email, sign in to their Microsoft account, and accept the invitation to join the family group.

If it still does not work, check these common causes:

• The invited person is already in another family group. A person can only be in one Microsoft family group at a time. They must leave or be removed from the current family group before joining a new one.
• The invitation link may have expired. If the invite was sent earlier, resend it and have them accept it again.
• Browser issue while accepting the invite. Try opening the invitation in a different browser or in an incognito/private window.
• No Microsoft account yet. The invited person must sign in with a Microsoft account. If they do not have one, they will be prompted to create one.

If the goal is to share a Microsoft 365 Family subscription, once the invitee accepts the sharing invitation, they automatically become a member of the subscription owner’s family group. Sharing works only while they remain in that family group.

• Add people to your family group | Microsoft Support
• Getting started with Microsoft Family Safety
• Share your Microsoft 365 subscription | Microsoft Support
• Someone invited you to share their Microsoft 365 subscription
• I am unable to join the family subscription account. - Microsoft Q&A