Corporate MS Office 365 was changed to child account.

The behavior is caused by Microsoft Family/parental consent being applied to the account that is now treated as a child account. To remove the “Parent or guardian consent” prompts and restore normal use, the family organizer (adult) must adjust or remove consent on that child account.

Use these steps (must be done by the parent/organizer account that originally granted consent):

1. Sign in as the parent at the Microsoft family management page
   • Go to https://account.live.com/mk (or the family page linked from the account dashboard) and sign in with the adult Microsoft account that granted consent.
2. Check the child account and its app permissions
   • In the list of child accounts, locate the affected account.
   • If the issue is that third‑party apps or installers are blocked, select Manage this child's access to third party apps.
   • Choose Enable access so the child account can use apps that are not published by Microsoft.
3. If the child account is not visible under that parent
   • It means either:
     • Consent has not yet been given from that adult account, or
     • Consent was granted by a different adult account, or
     • Consent was granted using a different Microsoft account for the same person.
   • In that case, sign in with the correct adult account (the one that originally approved the child) and repeat step 2.
4. If the account is incorrectly marked as a child (for example, the birthdate is wrong)
   • Use the parental-consent guidance to correct the age:
     • If the account shows as underage because of its birthdate, follow the steps under Why am I required to provide consent even though I am above statutory age? and use the interactive tool to correct the date of birth.
   • Once the account is recognized as an adult account, it will no longer require parental consent for app installs.
5. If consent is stuck in a loop
   • Have the parent:
     • Open the consent email again and follow the How to provide parental consent steps (sign in and approve).
     • If that still loops, remove the child from the family group, then add it back so that a fresh consent flow is triggered, and approve again.

If this is a corporate/work account on a company‑owned laptop, and the device or account is being treated as a child account in error, contact the organization’s IT administrator. They may need to:

• Confirm that the work account is not linked to a Microsoft Family child profile.
• Ensure the device is joined and managed only by the organization and not by a personal family/child configuration.

Once the child/parental status is corrected or the appropriate consent is granted, the Office 365 apps and other work-related applications should install without the repeated “Parent or guardian consent” loop.

References:

• Managing parental consent
• My child is not able to access 3rd party apps
• How do I stop supervising my child in Family Link? - Microsoft Q&A