create a Microsoft account for my child using his existing iCloud email

Stop all signup attempts for at least 24 hours, then retry once from a different trusted network and device using the child’s existing iCloud address.

Clear the temporary signup block

Email verification has already succeeded, so requesting more verification emails is unlikely to help. Microsoft can temporarily block sign-ups based on unusual activity, repeated requests, or network-related risk signals.

1. Do not attempt another signup for at least 24 hours. Repeated attempts can reset the temporary lock.
2. After 24 hours, disconnect any VPN or proxy and switch networks—for example, change from home Wi-Fi to mobile data.
3. Use an alternate device if available.
4. Retry account creation once, entering the existing iCloud email address rather than creating an Outlook address. Microsoft explicitly supports trying another device and using an email address as an alternative signup method.^1^
5. If it remains blocked, stop trying and wait longer—Microsoft advises waiting as long as one week when a 24-hour wait does not clear the restriction. Excessive repeated attempts can prolong the block.^2^

Using an iCloud address does not create a new mailbox or move the child’s email to Microsoft; it becomes the sign-in name for the Microsoft account.

Complete the child-account setup

During registration, enter the child’s correct birth date. If the child is below the statutory age for your region, Microsoft will request adult consent. The parent or guardian must sign in with their own Microsoft account and approve the request.^3^

After creation:

1. Sign in as the family organizer at https://account.microsoft.com/family.
2. Select Add a family member.
3. Choose Member, which is normally the appropriate role for a child.
4. Enter the child’s iCloud address and select Next.
5. Open the invitation in the child’s iCloud mailbox.
6. Sign in with the newly created Microsoft account and accept the invitation. Complete the adult-consent prompt if shown.^4^

Only a family organizer can add members, and an account can belong to only one Microsoft family group at a time.

If the retry still fails

• If the iCloud address was previously attached to a Microsoft account: do not try to register it again. Microsoft states that an address previously used for a Microsoft account cannot be reused, even after that account was closed.^1^ Use the existing account’s sign-in recovery path instead.
• If the page says the account is locked and displays an aka.ms/... reinstatement link: submit that form once and wait for Microsoft Online Safety to respond. Additional submissions can slow the review.^5^
• If no reinstatement link appears after waiting up to one week: use Contact Microsoft Support, enter the signup-block message, select Get Help, and then Contact Support. Support cannot manually change account details, but it can route the unresolved signup restriction appropriately.^3^

References

1. How to create a new Microsoft account | Microsoft Support
2. Troubleshoot Microsoft verification code issues | Microsoft Support
3. Managing parental consent | Microsoft Support
4. Add people to your family group | Microsoft Support
5. Microsoft account has been locked | Microsoft Support