How to Add Shared Mailbox in Outlook: Sydney SMB Guide

Start with the handover you want to make

Picture a reception inbox that needs coverage while someone is away. You might want the replacement to answer appointment questions, while a manager handles complaints. Write that division down before requesting access. For a Sydney office with staff working across locations, include who covers the address when the usual owner finishes for the day.

Before you can use a shared mailbox, your Microsoft 365 administrator must create it and add you as a member. Treat that as the starting point for the request. Give your provider the shared address and the names of the people who need access, rather than asking them to configure every computer without an agreed membership list.

Each person accessing a shared mailbox must have a licensed Exchange Online mailbox. Ask your administrator to confirm that prerequisite against your existing subscriptions. Keep the request tied to named staff accounts, so you have a clear record of who should participate when someone joins, changes role or leaves.

Microsoft advises keeping the shared mailbox account blocked from direct sign-in. Build your handover around each person's own account. If the proposed arrangement involves passing around a reception password, ask your provider to revisit the design before anyone starts using it.

Your initial brief can stay short: the address, its purpose and the person accountable for the work. Include an example of an enquiry and describe who should respond. If you need help settling the arrangement, bring that brief to a Microsoft 365 configuration discussion. Keep the conversation centred on the handover you want staff to perform.

Agree on access and the reply identity

The practical question behind how to add shared mailbox in Outlook is which responsibilities each person should receive. Separate permission to work inside the inbox from permission to send its replies. A manager reviewing correspondence and a receptionist answering customers may need different arrangements.

Full Access lets a user open and manage the shared mailbox, but sending from it also requires Send As or Send on Behalf permission. Send As makes the message appear to come from the shared mailbox. Send on Behalf identifies the individual as sending on behalf of that mailbox. Decide which identity you want customers to see, then have your administrator configure and test it.

For a general enquiries address, consider whether a consistent business identity suits your communication style. For correspondence requiring a named representative, consider whether showing that person's involvement would be clearer. Make this a business decision before your provider chooses permissions, and use an actual draft reply to discuss the difference.

Give your administrator a compact brief covering these points:

• •The shared email address and the named staff who should work in it.
• •Who should send replies, and which sender identity you want recipients to see.
• •The person responsible for unanswered enquiries and leave coverage.
• •The Outlook application each person uses and the handover test you want completed.

Users with the Exchange admin role can create shared mailboxes. Microsoft's creation instructions place this under Teams & Groups > Shared mailboxes in the admin centre. Leave that administrative work with your authorised administrator. Ask them to confirm the membership and sending permissions before staff begin the Outlook steps below.

Add the mailbox in new Outlook for Windows

The following walkthrough addresses how to add shared mailbox in Outlook when your staff use new Outlook for Windows. Have one intended member work through it with your administrator available. If their screen differs from the controls described here, pause and confirm the application rather than improvising changes to the account.

After your administrator adds you as a member, closing and restarting new Outlook should make the shared mailbox appear automatically in the folder pane. Begin with that restart. Keep your shared address handy so you can identify the intended inbox rather than mistaking another folder for it.

Microsoft notes that a recently added membership may take a few minutes to appear. Allow for that before repeating the setup. For the handover appointment, leave space to test the result instead of scheduling the change immediately before the replacement staff member needs to answer customers.

To add it manually in new Outlook, select Mail, right-click your account name in the folder pane, select Add shared folder or mailbox, then enter the mailbox name in the window. Follow that sequence from the person's normal work account. Ask the administrator to check the request if the intended address cannot be found.

In new Outlook, the shared mailbox appears beneath Shared with me, and expanding its name shows folders such as Inbox, Drafts and Sent Items. Open its Inbox and identify a harmless test message. Avoid using sensitive customer correspondence as your demonstration material.

Once the inbox is visible, have the staff member show you how they will move between their personal work and the shared address. Include this navigation in the handover notes. Keep those notes specific to the application you tested, with enough detail for someone covering reception to repeat the same path.

Test the reply from the customer's side

A visible Inbox is a useful checkpoint. The handover still needs a sending test. Arrange a test recipient you control, send a harmless enquiry to the shared address and ask the new member to handle it as they would a customer message.

For a new message in new Outlook, Microsoft's instructions say to select Show From on the Options tab if the From field is hidden, then select the shared address in that field. Have the staff member inspect the sender before sending. Include that check in your team's guidance for replies and new conversations.

At the receiving end, inspect the displayed sender and read the signature. Compare both with the identity you agreed earlier. If the result differs, give your administrator the test message and the intended outcome. Keep further changes focused on that discrepancy, rather than changing several settings at once.

By default, messages sent from a shared mailbox are saved in the sender's Sent Items folder rather than the shared mailbox's Sent Items folder. Microsoft's configuration guidance provides shared-mailbox Sent items settings for making sent messages visible to everyone. Ask your administrator to review those settings if your handover requires colleagues to see outgoing replies.

Repeat the test with another authorised member and have them locate the response. For your acceptance test, require the intended sender identity and the agreed reply visibility. Record what passed and what still needs attention, then nominate who will confirm the outstanding work before the inbox changes hands.

Give the inbox a clear day-to-day owner

Now turn the tested configuration into a working agreement. Nominate an inbox owner and a replacement for absences. Decide who handles an enquiry when it arrives, when they should escalate it and how they should leave unfinished work for the next person.

Consider a quotation request that needs input from your operations manager. Agree whether the first recipient should acknowledge it, who prepares the response and who checks it before sending. Write the handover around that sequence. Make the agreed owner of the next action clear enough for a colleague to follow without a separate conversation.

Microsoft states that you cannot prevent users from deleting messages in a shared mailbox. Discuss message handling with your team before granting access. If your business needs deletion restrictions, take that requirement back to your provider for a separate design discussion.

For routine correspondence, agree what staff should retain and when they should seek approval before removing something. Have the person responsible for business records approve that guidance. Keep any legal or record-keeping requirements in a separate, documented review rather than deciding them during an Outlook demonstration.

Tie membership reviews to staff changes and your usual operational review. When someone moves away from reception duties, ask whether they still need this inbox. If a request about how to add shared mailbox in Outlook involves several departments, settle the boundaries between those teams before extending access.

Bring recurring ownership questions into your managed IT support arrangements. Agree who approves membership changes and where requests should go. Keep a named business owner responsible for the decisions, with your provider responsible for the authorised configuration work.

Resolve missing access before the handover

If the test stops at a missing mailbox or an unsuccessful reply, capture the exact point of failure. Give your provider the affected person's account, the shared address and the application they used. Include the error wording where available, while keeping customer information out of screenshots.

Microsoft warns that hiding a shared mailbox from the address list prevents new members from adding it to their Outlook profile until it is shown again. Ask your administrator to review address-list visibility alongside the intended membership if a newly authorised colleague cannot add the mailbox.

For a sending problem, request a review of the sending permissions you agreed earlier. For a reply-visibility problem, return to the Sent items test. Keep the troubleshooting brief tied to one observed result, and ask for a repeat of that same test after any change.

Your next step is a small handover appointment: confirm membership, open the inbox and send a controlled reply. Have another member locate that response. Approve the arrangement when those tests match your expectations and the team knows who owns the next enquiry.

This article reflects best practices as of the publication date. Technology and security recommendations evolve, so verify current guidance with the original sources or our team before acting.