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License & Subscription Issues

How to Add an Existing Hotmail or Outlook Account to Microsoft 365 Family

Olivia MillerOlivia Miller Sep 30, 2026 868 views

Question details

The user wants to share Microsoft 365 Family subscription benefits with an existing Hotmail or Outlook.com account that is running out of storage.

How to Add an Existing Hotmail or Outlook Account to Microsoft 365 Family
Product
Microsoft 365, Outlook.com
Device & OS
not provided
Scenario
Sharing a Microsoft 365 Family subscription to upgrade an existing free Microsoft email account's storage capacity.
Observed behavior
The user needs a way to link an existing Hotmail or Outlook account to an active Microsoft 365 Family plan to unlock additional storage benefits without purchasing a separate subscription.
Before you start

Ensure you have the login credentials for the main Microsoft 365 Family subscriber account and the exact email address of the Hotmail or Outlook account you wish to invite.

Solution 1Recommended

Invite the Hotmail or Outlook Account to Your Family Group

The primary Microsoft 365 Family subscriber can share their subscription by sending an invitation link to the existing Outlook or Hotmail account through the Microsoft account dashboard.

By inviting an existing Microsoft account to your family group, they retain their current email address and files while gaining access to premium subscription benefits.

1
Sign in to the Microsoft account portal

Go to the Microsoft account sharing page and log in using the primary Microsoft 365 Family subscriber's credentials.

2
Navigate to the sharing options

Locate the 'Share your subscription' section on the Services & subscriptions page.

3
Send the invitation

Select 'Start sharing', choose 'Invite via email', and enter the existing Hotmail or Outlook.com email address you want to add.

4
Accept the invitation

Have the invitee open their Hotmail or Outlook inbox, find the invitation email, and click 'Accept' to join the family group and activate the storage benefits.

Invite the Hotmail or Outlook Account to Your Family Group
Storage Benefits Unlocked: Once accepted, the invited account will automatically receive the upgraded 50 GB Outlook.com mailbox limit and 1 TB of OneDrive storage.
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Frequently Asked Questions

Does sharing my Microsoft 365 Family subscription merge our email accounts?

No, sharing your subscription only shares the premium benefits, such as increased OneDrive and Outlook.com storage. Each person's email, files, and passwords remain strictly private.

How much storage does an invited Hotmail or Outlook account receive?

An account successfully added to a Microsoft 365 Family subscription receives 1 TB of personal OneDrive cloud storage and an expanded 50 GB Outlook.com mailbox capacity.

What should I do if the invited user doesn't receive the email invitation?

If the email invitation doesn't arrive in their Hotmail or Outlook inbox, you can log into your Microsoft sharing dashboard, select 'Create link' under the sharing options, and manually send that direct link to the user.