Microsoft 365 Shared Mailbox vs Google Workspace: What Teams Actually Run Into
By ThinkCloud
Every team eventually hits the same wall: one email address — info@, sales@, support@ — that more than one person needs to work from.
Both major ecosystems have an answer for this. Google has delegation and Groups. Microsoft 365 has shared mailboxes. On paper, they solve the same problem. In practice, they solve the access problem and leave the accountability problem completely untouched.
What a Microsoft 365 shared mailbox actually gives you
A shared mailbox in Microsoft 365 is a mailbox without its own login, accessed by adding it to your Outlook. That’s genuinely useful for one thing: more than one person can see the mail.
What it does not give you is any of the things a team inbox actually needs:
- No ownership. There’s no “this one is mine.” Everyone sees everything; nobody is responsible for anything.
- No state beyond read/unread. There is no “waiting on customer,” no “in progress,” no “done.” A conversation someone is mid-way through looks identical to one nobody has touched.
- No way to see who’s already replying. Two people open the same message and both answer — often with different promises.
- No reporting. You cannot answer “how fast do we respond” or “how many are open” without exporting mail somewhere else.
- Send-as is unreliable across clients. What the customer sees in the From field depends on how that person’s Outlook is configured — sometimes the shared address, sometimes the person’s own.
Teams that have lived with a shared password will recognise all of it. A Microsoft shared mailbox is a shared password with a slightly nicer lock.
The comparison, side by side
| Microsoft 365 shared mailbox | A shared inbox built for the job | |
|---|---|---|
| Getting someone in | Add it in Outlook, wait for it to appear | They log in |
| Who’s handling it | Nobody knows | Assigned to an agent |
| Two people reply at once | Both do, nobody sees | Live presence + collision detection |
| What the customer sees | Often a personal address, or a dead-end | Always the mailbox address |
| Status and deadlines | Read or unread | New · In progress · Waiting · Escalated · Closed, with SLA |
| Reporting | None | First response, resolution, per agent |
| Mobile | Painful | Works |
The left column isn’t a failure of Microsoft — it’s what “shared mailbox” means when the product only answers access. The right column is what you get when someone built for accountability.
Where this leaves Microsoft teams
This is the part most comparisons skip. If the product you’re reading about runs on Google Workspace, then “can I bolt it onto my Microsoft tenant?” has an honest answer: no.
A shared inbox isn’t a widget that connects to your mail server. It’s built on top of the platform — the identity, the mail API, the threading. Microsoft and Google expose those differently, so a tool built for one doesn’t just drop into the other.
Which means the real question for a Microsoft team isn’t “which shared inbox plugin?” It’s “is the move worth it?” And for a lot of teams, that move is already on the table — email, files, calendars — and the shared inbox is one more reason, not the reason.
The move, without the drama
If you’re migrating to Google Workspace anyway, the mail itself is the easy part to get right — provided it’s treated as a validated copy, not a leap of faith. The original stays intact until you’ve confirmed everything landed; nothing is deleted to “prove” the move happened.
And once you’re on Workspace, the shared inbox is just the next layer — the same addresses, the same threads, now with an owner and a status on every conversation.
If this is the wall your team keeps hitting, see the shared mailbox for Google Workspace — or book a 30-minute demo and we’ll show it running on a live inbox.