Summary

A distribution list is a shared address — [email protected], [email protected] — that anyone can write to, and every person on the list receives a copy in their own inbox. This guide creates one in the Microsoft 365 admin center, sets who is allowed to send to it, and tests it before you print it on anything.

Wanted something private instead? If you only want a saved group of addresses that you pick from when composing a message — "the Tuesday project crew", your five suppliers — that is a contact group, it lives inside your own Outlook, and nobody else in the company sees it. Go to How to Create a Contact Group (Distribution List) in Outlook instead. This article is for a shared, company-wide address.

In this guide

• 1. Confirm a distribution list is the right tool
• 2. Open Active teams and groups in the admin center
• 3. Start the wizard and name the list
• 4. Assign at least one owner
• 5. Add the members
• 6. Set the email address and decide who may write to it
• 7. Create the list and wait before testing it
• 8. Change the membership later
• 9. Delete a list you no longer need

Before You Start

• An admin account for your Microsoft 365 tenant — normally the account you used to set the subscription up. If you are new to the portal, Understanding the Microsoft 365 Admin Center for Non-IT Owners maps out what each section is for.
• A Microsoft 365 business license assigned to that admin account. Microsoft requires one before the admin center will let you edit distribution lists.
• The people who will be on the list already have accounts. If someone is missing, create them first with How to Add or Remove Users in Microsoft 365 Admin Center.
• About an hour of patience at the end — a brand-new list is not ready to receive mail the instant you create it.

Instructions

1. Confirm a distribution list is the right tool

Three Microsoft 365 features look similar from the outside, and picking the wrong one means rebuilding the address later.

A distribution list takes a message sent to one address and drops a copy into each member's normal inbox. There is no shared folder, no shared history, and no way to tell who replied — each person answers from their own mailbox. A Microsoft 365 group does the forwarding and creates a shared inbox, a calendar, a SharePoint site and an optional Teams team. A shared mailbox is a single inbox that several people open alongside their own, so everyone sees the same conversation and the same Sent items.

Pick the distribution list when you want an announcement or contact address and nothing more. Pick one of the others when people need to see each other's replies. Understanding Distribution Lists, Microsoft 365 Groups, and Shared Mailboxes compares all three properly, including how to convert between them.

2. Open Active teams and groups in the admin center

Every group in your tenant is managed from one page, and finding it is the only fiddly part of the whole job.

1. Sign in at admin.microsoft.com with your admin account. The Microsoft 365 admin center home page opens.
2. In the left navigation, click ... Show all at the bottom of the menu. The menu expands to its full length.
3. Click Teams and groups to expand it, then click Active teams and groups. A page listing every group in your tenant opens. Some tenants render these two entries with an ampersand — Teams & groups > Active teams & groups — which is the same place under a different label.
4. If the left navigation has moved again since this was written, type groups into the Search box at the top of the admin center and choose Active teams and groups from the results.
5. On the Active teams and groups page, click the Distribution list tab. The list is empty on a new tenant, which is normal.

3. Start the wizard and name the list

The name is what colleagues see in the address book, so write it for them rather than for you.

1. Click + Add a distribution list. The Set up the basics page opens.
2. Type a name in the Name box. Use the plain-English version of what it is for — Sales or All Staff, not DL-SLS-01. This is the text that appears in the To line when someone picks it out of the address book.
3. Type a short line in the Description box, such as Reaches everyone in the sales team. Future-you will not remember what Ops 2 was for.
4. Click Next. The wizard moves to the Assign owners page.

4. Assign at least one owner

An owner is the person who can change the membership later without going near the admin center.

1. On the Assign owners page, click + Assign owners. The Assign owners pane slides in from the right.
2. Select the people who should manage the list, then click Add. Name a second owner if you can — a list whose only owner leaves the company is a list nobody can edit.
3. Back on the Assign owners page, click Next. The wizard moves to the Add members page.

5. Add the members

Members are the people who receive a copy of everything sent to the address.

1. On the Add members page, click + Add members. The Add members pane opens.
2. Select each person who should receive mail sent to this address, then click Add. Owners are not members automatically — if an owner also needs to receive the mail, add them here too.
3. Click Next. The wizard moves to the Edit settings page.

6. Set the email address and decide who may write to it

This page holds the two decisions people regret, and one of them is invisible until a customer complains.

1. In the group email address box, type the part before the @ — sales, info, support — and pick your domain from the dropdown beside it. Keep it short and guessable; this address goes on business cards and email signatures.
2. Select Allow people outside of my organization to send email to this Distribution group if anyone outside the company will ever write to this address. A new distribution list rejects outside mail by default, so a customer-facing sales@ address left unselected silently bounces every message a customer sends it.
3. Leave that option clear for an internal-only list such as all-staff@, which keeps outside spam off the whole company's inboxes. Either way this is not a one-time decision — the first row of the Troubleshooting table below changes it later without rebuilding the list.
4. Click Next. The Review and finish adding group page shows everything you have entered.

7. Create the list and wait before testing it

The list exists the moment you click the button, and it starts working roughly an hour after that.

1. Read the summary on the Review and finish adding group page. Check the email address character by character — the address is the one thing you will be repeating out loud for years.
2. Click Create group, then click Close. The new list appears on the Distribution list tab.
3. Wait about an hour before you rely on it. Microsoft's own guidance is that a distribution group usually takes about 60 minutes to be fully created and ready for management, and mail sent inside that window can bounce.
4. After the hour, send a test message to the new address from your own mailbox, and ask one member to confirm it landed. A message that arrives for you but not for them means the members did not save — check step 8.
5. If the address is customer-facing, send a second test from a personal account outside the company. That is the only way to prove the setting in step 6 is doing what you think it is.

8. Change the membership later

Membership changes are a two-minute job, and they need no wizard.

1. Go back to Teams and groups > Active teams and groups and click the Distribution list tab.
2. Click the name of the list. A details pane opens on the right.
3. Click the Members tab, then, under Members, click View all and manage members. The Members pane opens with the current list.
4. Click + Add members, select the people you want, and click Add.
5. To take someone off, select their name in the Members pane and click Remove members. Removing a member stops future mail reaching them and changes nothing else — their mailbox, their old copies of past messages, and their account are all untouched, and adding them back takes ten seconds.
6. Close the Members pane. Give changes time to travel: mail routing catches up quickly, but the copy of the address book that classic Outlook keeps on the desktop refreshes on its own schedule and can lag by a day or two. Typing the full address by hand works immediately either way.

9. Delete a list you no longer need

Deleting removes the address itself, so this is the step to be certain about.

1. Before deleting anything, ask whether the address has ever been published. Mail sent to a deleted address bounces — the sender gets a non-delivery report and no copy reaches anybody. If sales@ is printed on invoices, in email signatures, or on your website, deleting it turns every one of those into a dead end.
2. Consider emptying the membership instead. A list with no members accepts nothing useful, but the address stays alive and you can rebuild it in a minute.
3. To delete: open admin.exchange.microsoft.com, the Exchange admin center, and click Recipients > Groups, then the Distribution list tab.
4. Select the list you want to remove and click Delete group. Confirm when prompted.
5. There is no undo button here. Recreating the list means running the whole wizard again and re-adding every member by hand, so write the membership down first if there is any doubt.

Troubleshooting

WARNING

The single most common failure is an outside sender being rejected. A distribution list is set to Only allow messages from people inside my organization by default, which is exactly wrong for a customer-facing address — customer messages bounce and neither you nor the customer is told anything useful. If the address will ever appear outside the company, turn the outside-senders option on and prove it with a test message from a personal account.

Symptom / Error	Potential Cause	Solution
Customers get a bounce, colleagues get through	Outside senders still blocked	In the Exchange admin center, click Recipients > Groups > Distribution list, open the list, click the Settings tab, and under Delivery management choose Allow messages from people inside and outside my organization. Retest from a personal account.
Mail to the new address bounces for everyone	Created less than an hour ago	Wait the full 60 minutes Microsoft allows for a new distribution group, then retest. If it still bounces after two hours, confirm the address on the General tab matches what you typed.
The list does not appear in Outlook's address book	Cached address book on the desktop	Typing the full address in the To box works right away. The offline copy classic Outlook keeps can take a day or two to catch up — nothing is broken while it does.
One member never receives anything	Not actually on the list, or an outside address	Check the Members pane in step 8. If that person's address is outside your company, mail to a group they belong to may not reach them and no bounce is generated — add them to the list as a contact rather than assuming it worked.
The Distribution list tab or Add button is missing	Admin account has no business license	The admin center requires a Microsoft 365 for business license on the account editing groups. Assign one to your admin account under Users > Active users, sign out, and sign back in.
Replies to the list go only to the sender	Working as designed	A distribution list drops copies into individual inboxes; replies behave like normal email. If everyone needs to see the whole thread, you want a shared mailbox or Microsoft 365 group — see the comparison in step 1.

Related Articles

• How to Create a Contact Group (Distribution List) in Outlook
• Understanding Distribution Lists, Microsoft 365 Groups, and Shared Mailboxes
• How to Add or Remove Users in Microsoft 365 Admin Center
• Understanding the Microsoft 365 Admin Center for Non-IT Owners

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