What you’re seeing
- The former employee's mailbox now shows only the last year or two of email, and older folders seem empty.
- The 'Online Archive' that used to appear under their mailbox in Outlook is gone or shows an error when opened.
- Searching for a client's old correspondence returns nothing, even though the employee worked with them for years.
- The admin center flags that the shared mailbox has an archive but no license.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- A shared mailbox with an online archive needs an Exchange Online license, so removing the license can cut off access to the archive.
- The default retention policy had been moving mail older than two years into the archive, so most history lived there rather than in the main mailbox.
- Outlook desktop often doesn't display the archive of a shared mailbox added through automatic mapping, even when the archive still exists.
- Outlook's cached mode downloads only a limited window of shared mailbox mail, which makes older messages look missing on the PC.
- A litigation hold or retention policy on the original mailbox was lost or never set, which raises the risk of the data being purged later.
Why it matters
A departing employee's email often holds the only record of customer commitments, pricing agreements, and supplier disputes. Losing access to the archive can mean a manager can't answer a client, defend a warranty claim or respond to a legal request. The mistake usually happens during a cost-saving step, so it's easy to repeat across every leaver. If the license removal triggers data deletion after the grace period, the loss can become permanent, which is a real legal and financial risk.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Is the old email actually deleted?
Usually not right away. The archive often still exists but is inaccessible, and acting before any grace period ends greatly improves the odds of getting it back.
Do shared mailboxes ever need a license?
Yes, when they have an online archive, are larger than 50 GB or are on litigation hold. Converting a leaver's mailbox only stays free when none of those apply.
What does AskTechGurus do?
A certified US engineer reviews the mailbox, archive and retention status in a remote secure session and explains the options. Service starts from $99 and you pay only when it's resolved.