This situation feels like a ghost in the machine. Imagine logging into your Microsoft 365 account one day, only to find that your contacts have vanished. Then, as if that wasn’t enough, your archived emails start disappearing too. That’s exactly what’s happening to users, and it’s causing headaches for IT administrators.
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The Contacts Problem
Back in February 2025, Christian M., an IT administrator, noticed something odd. Contacts in several Microsoft 365 accounts were deleted without warning. No clear pattern emerged—users were on both Windows and macOS devices. Log files showed numerous “MovedToDeletedItems” actions for one mailbox.
Attempts to Solve the Issue
Suggestions from experts pointed to client devices (like smartphones) possibly triggering the deletions. Microsoft Support requested AzureAD logs, but these logs only go back seven days. With no access to older logs, the case hit a dead end.
Now Emails Are Disappearing
Fast forward to March 2025. Christian M. reports another bizarre issue:
- Emails in the archive folder are being deleted—about 15,000 so far.
- Logs show similar “MovedToDeletedItems” actions, this time moving emails from “/Archive” to “/Deleted Items.”
- Microsoft Support hasn’t provided a resolution yet.
What Could Be Happening?
Here’s what we know:
- Client-Side Issues: Devices connected to the accounts may be causing these deletions.
- Log Limitations: AzureAD logs are only available for seven days, making it hard to investigate older events.
- Not an Isolated Case: Other users have reported similar problems, ruling out coincidence.
What Can You Do?
If you’re facing these issues:
- Check Connected Devices: Review all devices linked to the affected accounts.
- Audit Permissions: Ensure no unauthorized apps or users have access.
- Monitor Logs Frequently: Since logs are time-sensitive, keep a close eye on them.
- Contact Microsoft Support Early: Provide as much detail as possible before logs expire.
This isn’t just frustrating—it’s disruptive. Losing emails and contacts can impact business operations and personal workflows. While Microsoft Support is working on it, administrators need proactive strategies to mitigate risks. If you’ve experienced similar issues, share your insights with others—it might help uncover the root cause faster.