Outlook.com mailbox corruption — Sent Items missing, hydration failure, Recoverable Items reset to 1/22/26

Question

My Outlook.com mailbox is missing core data. Sent Items is empty, older messages will not load, and Recoverable Items only show items since 1/22/26. This is not a deletion issue — the mailbox appears to be in a corrupted or partial‑hydration state. I have already attempted all standard recovery steps. I cannot access Outlook.com in‑app support because my account is misclassified as a business tenant, which redirects me to business support and hides consumer support options. I need this escalated to the Outlook.com engineering team for mailbox repair.”

Answer 1

Hi Mike Buckingham

I hope you are doing well ! I just want to check if you have had a chance to test the steps earlier? Please let me know if they helped resolve the issue or if you are still experiencing any difficulties. I am here to assist you further.

Best Regards

Answer 2

Dear Mike Buckingham

Thank you for reaching out to the Microsoft Q&A Community. I understand you are having problem with Outlook.com mailbox corruption (Sent Items missing, older mail not loading, Recoverable Items only since 1/22/26). I am happy to assist you. Please : 

1. Capture what remains: Start Settings > General > Privacy and data > Export mailbox. The export creates a .pst and may take up to 4 days; you’ll receive a download email when ready.  
2. Optional immediate backup (desktop Outlook): If some folders still render in a profile, export those to .pst via File > Open & Export > Import/Export > Export to a file > Outlook Data File (.pst).  
3. Escalate despite in‑app misrouting: Open Contact - Microsoft Support, sign in with any personal Microsoft account, choose Outlook.com, then chat/request a call to request mailbox repair/re‑hydration (consumer support route outside the in‑app pane).  

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Answer 3

Just adding a quick clarification: I am unable to access Outlook.com consumer support through the in‑app Help panel because my account is being routed as a business tenant. This prevents me from reaching the normal escalation path. The mailbox symptoms (missing Sent Items, older messages not loading, Recoverable Items reset to 1/22/26) appear consistent with a mailbox corruption or hydration failure. I would appreciate escalation to the Outlook.com engineering team for review.