Hello Richard Henson,
Thank you for posting your question in the Microsoft Q&A forum!
I realize that you've encountered a problem with Microsoft account I truly understand your confusion. Let me assist you further.
- Do I have both a personal and a work/school Microsoft account using the same email address? This identifies the root cause of almost all duplicate‑account problems.
- How can I check which account (personal or work/school) is linked to my Microsoft 365 subscription, OneDrive, or purchases? This ensures you don’t accidentally delete the wrong account.
- How do I rename or change the sign‑in email (alias) for my personal Microsoft account to stop the conflict? This leads to Microsoft’s official fix: changing the alias, not deleting accounts.
- How do I safely back up my data before closing one of the accounts? Important if you choose to delete the personal account later.
- Which account should I keep if I only want to use one, the personal account or the work/school account? Microsoft’s instructions depend entirely on which account you plan to keep.
I am looking forward for your respond. Thank you so much for your times.