mailvault365
Microsoft 365 email archiving

The simplest
email archive for
Microsoft 365.

Connect your tenant in five minutes. Every email is archived automatically and found again in seconds — no servers to run, no storage to manage, nothing to maintain.

Start your free trial

14 days free · then $4 / mailbox / month · no credit card to start

14-day free trial
5-minute setup
Nothing to install
Read-only access

How simple?

Three steps. Five minutes.

No infrastructure to set up. No servers, no agents, no on-prem deployment.

1

Sign in with Microsoft 365

Click the Microsoft login button. Use your existing admin account. That's your sign-up.

2

Approve once

Grant mailvault365 read access to your mailboxes. Standard Microsoft consent flow — takes 30 seconds.

3

You're archiving

Every email — past and future — is automatically archived. Search and download anytime.

Two views, one product

End-user simplicity.
Admin control.

Every user signs in and finds their own mail. Admins keep oversight, manage permissions, and audit access — all from the same product.

Archive / Mailbox

Sarah Mitchell

s.mitchell@contoso.com

Up to date · 2 min ago
Saved Invoices 2026 HR · contracts From legal Attachments only
invoice 2026 ↵
Has attachment

Messages

7 matches · 12,847 archived
RE: Your invoice request — May statement

From: m.morgan@globex-corp.com

May 3
Invoice INV-2026-0412 attached

From: accounts@globex-corp.com

May 1
Your invoice for April 2026

From: billing@cloudprovider.com

Apr 28
Quarterly invoice batch · Q1 2026

From: m.morgan@globex-corp.com

Apr 22
Invoice + delivery note for order #4471

From: supplier@initech.com

Apr 19
RE: Your invoice request — March statement

From: m.morgan@globex-corp.com

Apr 4
Invoice INV-2026-0388 attached

From: accounts@globex-corp.com

Apr 2

Administration

Overview

Contoso Ltd. · live archive monitoring

Sync active · checked 2 min ago

Storage

20 GB / mailbox · pooled

68.4 GB

of 4.94 TB (1.4%)

56,294 messages archived 4.87 TB free

Mailbox health

247 mailboxes total

Manage →
Up to date 240
Syncing 5
Removed 2
Emails archived
56,294
68.4 GB on disk
Active mailboxes
247
Synced from M365
Users
38
Owners + members
Cross-views (24h)
12
Logged accesses

Activity

Last 30 days

Emails archived

Last 30 days · daily

+18.4%

Top mailboxes

By storage used

Size Mails
Accounts Payable 14.3 GB
Sarah Mitchell 4.2 GB
Alex Brooks 3.4 GB
David Carter 2.8 GB

How access works

Self-service for users.
Full control for admins.

Most "I need an old email" requests don't need IT. Every employee searches their own archive in seconds — admins decide who gets to see beyond that.

Default for everyone

Default access

Every user signs in with their existing M365 account and finds their own mail. Like Outlook search — but forever, and faster.

Granted by admins

Grant on demand

Need a finance auditor to see the AP team's mailboxes? An office manager their direct reports? Admins grant scoped access in a few clicks.

Always traceable

Always logged

Every cross-archive view, search, and download is recorded with user, time, and target. Built-in transparency for compliance.

Search

One query.
Every mailbox you can see.

Outlook only searches one mailbox. mailvault365 searches every mailbox you have access to — at once — with sender, recipient, attachment, and date filters. Save the queries you run weekly.

invoice 2026 ⏎
Filters Has attachment From: @globex-corp.com Last 90 days Any recipient

24 matches across 6 mailboxes · 1.84 M archived messages searched in 142 ms

Sort: Newest
SM

RE: Your invoice request — May statement

s.mitchell@contoso.com · May 3

Invoice for May attached. Net 2026-05-01 to 2026-05-31, total €4,820.50 incl. VAT — please remit by 30 days …

AP

Invoice INV-2026-0412 attached

accountspayable@contoso.com · May 1

Hi team, attaching invoice INV-2026-0412 for the audit advisory engagement Q1. PO-7741 — same payment terms as …

DC

Quarterly invoice batch · Q1 2026

d.carter@contoso.com · Apr 22

See attached folder — 11 invoices totalling €38,420 covering Q1 2026. All approved by finance, please process …

LB

RE: Your invoice request — March statement

l.bennett@contoso.com · Apr 4

Forwarded as requested. March invoice is the third PDF (2026-03 monthly statement) — flagged the contested line items …

Showing 4 of 24 matches · View all →

Multi-field full-text

Subject, sender, recipient, body — every field is indexed. Boolean operators, exact phrases, partial matches.

Combine filters freely

Stack From + To + has-attachment + date range in one query. Find "all invoices from supplier X with attachments, last quarter" in seconds.

Save and re-run

The query you run every Monday morning? Save it. One click brings it back — never type "from: legal date:>30d" again.

Peace of mind

Nothing gets lost.
Nothing gets changed.

Once an email is archived, it stays exactly as it arrived — permanently. That's what makes it an archive, not a backup.

Stored exactly as received

Every email is kept unchanged from the moment it arrives — including all attachments. What you retrieve years later is exactly what was sent.

Nobody can delete or edit

Not users, not admins, not us. Archived emails cannot be altered or removed — exactly what a compliance review expects.

Every access is logged

Whenever someone opens a mailbox that isn't their own, it's recorded automatically — who, what, and when. You always have answers.

Yours to take with you

Download any email as a standard file that opens in Outlook or any other mail program. No proprietary format, no lock-in.

Why mailvault365

Built for one job. Done right.

Simple by design

No technical setup. No admin certification. The interface is so straightforward you'll get it on the first try.

  • 5-minute setup
  • No infrastructure to manage
  • Self-service onboarding

M365 specialist

We do one thing — Microsoft 365 email archiving. No generic connectors. No second-class M365 support.

  • Native Microsoft integration
  • Works with all M365 plans
  • Microsoft sign-in only

Private & secure

We only ever read your mail — never change or send anything. Each user sees their own mailbox; anything beyond that is granted by an admin and logged.

  • Read-only access to your mail
  • Your data is kept fully separate
  • Every cross-mailbox access is logged

Features

Everything you need.
Nothing you don't.

Archives automatically

Connect once and forget it. New email lands in the archive within minutes — around the clock, without anyone lifting a finger.

Find any email in seconds

Search subject, sender, recipient, and body — across every mailbox you can see, in one query. Save the searches you run every week.

Nothing to run or maintain

No servers, no storage, no updates, no monitoring. We run everything — your team just signs in and searches.

Keeps mail of former employees

When someone leaves and their account is deleted, their archive stays — searchable and downloadable for handovers and audits.

Private by default

Everyone sees only their own mail. Admins grant access to other mailboxes when needed — and every such access is logged.

Shared mailboxes included

Personal, shared, and group mailboxes are all archived the same way — same features, same price.

Pricing

One simple price.
All features. Always.

No tiers. No "Pro" upsells. The price you see is the price you pay. Per mailbox, billed monthly, cancel anytime.

All features included · 20 GB per mailbox
14 days free · no credit card
$4 / mailbox / month

14 days free · then billed monthly · cancel anytime · no setup fees

What's included

  • Continuous Microsoft 365 archiving
  • Full-text search across every mailbox
  • Personal, shared & group mailboxes
  • 20 GB storage per mailbox
  • Download any email anytime
  • Per-customer data isolation
  • Email support
  • All future features

What you don't pay for

  • Setup fees
  • Per-feature tiers (Basic / Pro / Enterprise)
  • Per-admin or per-seat surcharges
  • Mandatory annual contracts
  • "Premium support" upsells
  • Hidden costs
25 mailboxes
$100 / month
100 mailboxes
$400 / month
500 mailboxes
$2,000 / month
Start your 14-day free trial

No credit card · 14 days free · then $4 / mailbox / month

FAQ

Quick answers.

Your emails are stored as standard email files that open in Outlook or any other mail program — never a proprietary format. You can download individual emails anytime; if you need a complete export before cancellation, contact support and we'll arrange it.
Your archive is stored on European infrastructure and is yours alone — other customers can never see it, search it, or end up in it. Connections to Microsoft 365 are encrypted. Detailed hosting information is available on request.
No. Everyone signs in with their existing Microsoft 365 account. Your existing SSO, 2FA, and conditional access policies apply automatically.
No. Each user only sees mail from their own mailbox — exactly what they could already access in Outlook. mailvault365 preserves access scope; it never expands it.
No — that's the whole point of an archive. No user and no admin can delete individual emails. The only exception is your account owner permanently removing an entire mailbox archive after the employee has been removed from Microsoft 365 — a deliberate cleanup step, never an automatic one.
Their archive stays. You can revoke their login while keeping the mailbox archived — admins can still search and download from it for compliance and handovers.
No. mailvault365 syncs in the background using read-only Microsoft Graph access. Your users notice nothing — same Outlook, same delivery times.
Yes. Everything still in your Microsoft 365 mailboxes is archived automatically the moment you connect. For history that only lives in your old archive, contact us and we'll take care of the migration together.
Yes — every new account gets 14 days free with full access to all features. No credit card required to start. You only enter payment details if you decide to keep using mailvault365 past day 14.
$4 per mailbox, billed monthly, cancel anytime. No setup fees. No minimum commitments. No "Enterprise Plan" upsells.

Other questions? Get in touch →

Ready to simplify your
email archiving?

Try it free for 14 days — no credit card. Then $4 per mailbox per month. Cancel anytime, no setup fees.

Start your free trial