Pin a Decision in Slack or Teams So It Does Not Get Buried

A decision made in chat is easy to lose. It lands in the middle of a long thread, and a week later someone asks the same question again. This guide gives you a small message format for writing a decision down, the steps to pin it in Slack and Teams, and the limits that differ between the two apps.

Miles Crawford

7 min read

This image was generated with AI

Write the decision so it stands alone

A pinned message gets read without the discussion around it, so it has to make sense by itself. This is our suggested layout, not a Slack or Microsoft format:

Decision. One sentence stating the agreed outcome: "The project owner approved shipping the new onboarding checklist on November 3, 2026."
Why. One line on the main reason, so nobody has to reopen the argument to understand it.
Who owns it. One name, not a team.
Date decided. Write the date out. "Today" stops being true tomorrow.
Link to the discussion. Paste the link to the thread or meeting notes for people who want the detail.

If you want a review point, add a sixth line with a date to look at it again. Leave it out if you do not have one.

A short emoji key

A few emoji make decisions easy to scan when you look back through a channel. Our suggestion, with a word next to each one so the meaning does not depend on the picture:

✅ Decided: the line that starts the message.
📌 Pinned: the decision is in the Pins tab or pinned post area.
🔁 Replaced: put this at the top of an older decision when a newer one takes over.

Type the word as well, such as "✅ Decided". Some readers use screen readers or have trouble telling small symbols apart, and our accessibility guide explains why a bare emoji can be missed.

Pin it in Slack

Slack lets you pin an important message to a channel or a DM. A pinned message is added to the conversation's Pins tab.

Post the decision message in the channel.
On desktop, hover over the message and click the three dots icon. Choose Pin to channel, or Pin to this conversation in a DM. On some plans it sits under Organize.
To find it later, open the channel and select the Pins tab.
To remove one, open the Pins tab, hover over the message, click the three dots icon, and choose Un-pin from channel.

Slack also lets you drag and drop tabs in the conversation header to reorder them, and to move pinned messages in and out of folders, which helps if a busy channel collects many pins. If you want the newest decision in front of everyone, you can also mention it in the channel topic. Slack says topics can be up to 250 characters and can include emoji.

Pin it in Teams

Teams handles chats and channels differently, and the limits matter.

In a chat. Hover over the message, select More options, then choose Pin for everyone. Microsoft lists these limits:

Only one message can be pinned at a time in a chat, so a new pin replaces the old one.
Everyone in the chat can see the pinned message.
Anyone in the chat, except guests, can unpin a pinned message or replace it with a different one.

In a channel. Hover over the post or reply, select More options at the top right, then choose Pin. Pinned posts appear in the channel details pane, which you open from the upper right corner of the channel. Microsoft says only the three most recent pinned posts show there, and you select Pinned to see all of them.

If you cannot pin in a channel, check with a team owner or channel moderator. Microsoft says owners and moderators can allow members to pin: open More channel options, then Manage channel, set Moderation to On, and check Allow members to pin channel messages.

A Teams chat pin may contain a long message, but Microsoft says only one line fitting the chat window is visible at the top. Select it to jump to the original message. To remove it, use More options, then Unpin for everyone. Because a chat holds one pin, put the agreed outcome first and replace it with the new one when the decision changes. Put 🔁 Replaced at the top of the old message if you want to leave a trail in the history.

Check visibility separately from acknowledgment

Use this original verification aid after writing the decision. Finding the pin and agreeing to the decision are different checks.

What to check	Useful evidence
The right message is pinned	Open Pins or the channel's pinned-post area, or select the Teams chat banner and check the original message.
The reference is usable	Check that the link points to the current record and the intended readers have authorized access.
An owner has accepted an action	Get a reply stating the action and timing. A pin or emoji alone does not establish that agreement.

Fictional example: "The approved checklist decision is pinned above. Please reply if you cannot open the record. If you own a rollout step, confirm that step and its due date in the task; a reaction here only acknowledges this update."

Microsoft documents conditions for Teams read receipts, including administrator settings and whether the person is active in the chat. Even a receipt is not approval or proof of understanding. Our read-receipts guide separates those states.

What not to pin

A pin is public to everyone who can see the channel or chat. Think about who that is before you pin.

Do not pin a decision about a named person, such as a performance, pay or hiring matter, in a channel with a wider audience. Keep those where your company's process says they belong.
Do not pin passwords or access codes. Keep sensitive customer information in its approved system; if a reference link is needed, check both the conversation audience and the destination permissions. A link is not permission to reveal a secret.
Do not treat a pin as the official record. If a decision needs approval, a contract or a signed record, the pin points to that and does not replace it.
Do not pin your own opinion as a decision. Wait until the person who decides has said so, then write down what they decided.
Remove or replace a pin when it is out of date. An old decision that still looks current is worse than none.

We are describing a communication habit, not offering legal or records-management advice. Rules about what you must keep and for how long belong to your employer.

When the decision changes

Post a new decision message instead of editing the old one, so the channel keeps an honest history. Pin the new one, un-pin the old one, and link the two. If you are handing work to someone else, our shift handoff guide shows how to pass on what is still open, and the outage status guide uses the same pin habit for a problem that is still moving. If your team uses ✅ to acknowledge an update, ask for it with that meaning stated in text. A reaction is not proof of reading or understanding, approval of a change, or acceptance of ownership. Ask for an explicit confirmation when the distinction matters. Best reaction emojis for work has a few more that read clearly at small sizes.

Sources

Checked October 29, 2026. The Slack and Teams steps and limits follow each product's own help articles. The decision format and the emoji key are our suggestions.