Short answer: It depends on how the shared mailbox signs in. In Jace, a shared address that has its own password connects like any other inbox. A delegated or shared mailbox that you open through someone else's Outlook account does not connect as a separate inbox, and neither does a send-as alias. The Jace multi-account docs say this directly: "Jace connects mailboxes that have their own sign-in."
We make Jace, so read the Jace parts as ours. This page was checked on 15 November 2026 against the live Jace site and docs. It does not rate other assistants, and it does not cover how any tool performs on a given day.
Why the answer is not a plain yes
"Shared mailbox" covers at least three different setups, and assistants treat them differently.
A shared address with its own login. support@ or info@ has its own password, and someone signs in to it directly. Jace treats it as a normal mailbox.
A delegated or shared mailbox inside another account. In Outlook, you can open a mailbox that belongs to someone else, or a shared mailbox, from your own account. There is no separate sign-in for it. Jace connects mailboxes that have their own sign-in, so this one does not appear as a separate inbox.
A send-as alias. sales@ can be an address you send from while the mail lands in your own inbox. It is not a mailbox at all, just another from address.
Before you buy, work out which of these you actually have. Your IT admin or your Google Workspace or Microsoft 365 settings will tell you.
How each setup works in Jace
Shared address with its own password. Open the account menu at the bottom of the sidebar, click Add another account, and sign in with Google or Microsoft. Per the docs, "The new inbox joins your existing subscription at no extra charge." Plans cap how many inboxes you can connect, so check the pricing page for the current limit on your plan.
Delegated or shared mailbox opened through Outlook. The docs say these "don't connect as separate inboxes." If you rely on this setup today, Jace will not draft replies inside that mailbox as its own inbox. Ask your admin whether the address can get its own sign-in.
Send-as alias. The alias does not become its own inbox. It can still be the address you reply from. The signature and send-as docs say Jace syncs your Gmail send-as settings, and for Outlook it syncs your default from address. You can choose whether replies come from your default address or from the address that originally received the email. If you add or remove send-as addresses in Gmail or Outlook, re-sync them in Jace.
One mailbox, many people
A team usually sets up a shared mailbox so that several people can answer from it. Keep two things apart here: an inbox and a seat.
Per the multi-account docs, "A connected inbox and a team seat are not the same." Adding a shared address under your own login costs nothing extra. Inviting a teammate is different: the team setup docs say each invite adds a paid seat, and if the invite is never accepted, the unused seat expires after 7 days.
The Jace docs describe connecting an inbox to one person's login. They do not describe several teammates sharing one connected inbox with a common draft queue. If that is what your team needs, test it in the trial with your real setup before you plan around it.
Settings stay per inbox
A shared support address and your own work mail need different behavior. In Jace, each connected inbox has its own labels and settings, so auto-drafts run separately in each one. Drafting options such as "Autodraft only when directly addressed" apply to the inbox you are in. That lets you set the support inbox to draft broadly while your own inbox stays quieter.
A quick way to decide
Answer three questions about the mailbox you care about:
- Can someone sign in to it directly with a password of its own? If yes, it connects in Jace as a normal inbox.
- Do you only reach it through your own Outlook account? If yes, Jace will not list it as its own inbox today.
- Is it only an address you send from? If yes, treat it as a send-as alias and pick it as your reply address.
If your answer is 1, try it on the Gmail or Outlook integration during the trial. For law firms and consultancies, check the intake address itself rather than assuming the firm’s email setup is supported.
To try it with your own shared address, start a free trial.
FAQ
Can Jace connect a shared mailbox like support@? Yes, if the address has its own password. Add it with Add another account like any other inbox.
Can Jace connect a delegated Outlook mailbox? Not as a separate inbox. Per the docs, delegated or shared mailboxes opened through someone else's Outlook account don't connect as separate inboxes.
Does a shared inbox cost extra in Jace? Not under your own login. The docs say a new inbox joins your existing subscription at no extra charge. Inviting a teammate adds a paid seat.
Can Jace reply from an alias? It can use your send-as addresses. You can choose whether replies come from your default address or from the address that received the email.
Do settings carry over between my inbox and the shared one? No. Each connected inbox has its own labels and settings, and auto-drafts run separately in each one.
