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Find an Old Message in Slack and Teams: Search Filters That Save Time

Somewhere in chat there is a message with the date, the link or the decision you need. Typing one word into search usually returns too much. This guide covers the filters in Slack and Teams that narrow a search, according to their help pages, and a few habits that make your own messages easier to find later.

Miles Crawford

Miles Crawford

4 min read
A person looking at a large magnifying glass held over a long stream of faint chat bubbles, with filter dials and a calendar beside it and one highlighted pinned bubble inside the lens
This image was generated with AI

Searching in Slack

Slack's help describes your conversations as a searchable archive. Click the search field at the top, type what you want and press Enter, then use Filters or the sidebar to switch between messages, files, people, channels and canvases. The real speed-up is in modifiers you add to the search text. These come from Slack's help page:

  • Quotation marks search for an exact phrase, such as "marketing report".
  • A dash before a word leaves it out, so marketing -report finds marketing without the word report.
  • in: limits the search to a channel, person or section, and from: limits it to messages shared by a specific person.
  • before:, after: and on: take a date, and during: takes a month or year.
  • is:thread searches within threads, and is:saved or has:pin finds things you saved or that are pinned.
  • has: followed by an emoji code finds messages with that reaction, for example has::eyes:. Slack says hasmy: finds messages that you reacted to.

Slack adds that you can combine modifiers, for example a phrase with in: and from: together.

Searching in Teams

In Teams, type a keyword or a person's name into the search box at the top, then select Messages to narrow results to messages. Microsoft lists filters for the type (chats or channels), the team, channel or chat, the sender, a date or date range, and more options such as messages that mention you, messages with attachments, or hiding messages from apps and bots. To search within the conversation you are already in, press Ctrl+F (Cmd+F on a Mac), type your term and select Go. Results appear on the right, under Find in chat. If you mostly want to jump to a chat or channel by name, type / in the search box and choose /goto.

Microsoft also says you can look for files, links, messages and posts in the Shared tab of each chat or channel, and the search page has separate filters for files.

A search routine that works

This order is our suggestion:

  1. Start with where and who. Pick the channel or chat and the person you think wrote it.
  2. Add a date range. Even a rough month cuts a lot of noise.
  3. Use a distinctive word or exact phrase. A project name, a ticket number or a unique term beats a common word.
  4. Check threads. The answer is often a reply under a message, not a message in the channel.
  5. If it was marked, search for the mark. In Slack, a reaction, a pin or a saved item is searchable.

Make your own messages easy to find

The best search is one you do not need. Put the key words in the first line of a message that matters, such as "Decision: ship on Thursday". Pin the final decision so it has a known home, and keep related replies in one thread. A shared reaction can also act as a tag. If your team uses ✅ for done and 👀 for looking, a Slack search with has: finds them again, and our reactions guide covers using reactions for follow-up.

What to be careful about

  • You only see what you can access. Search results depend on the channels and chats you are in and on your workplace's settings. If something is missing, it may not be visible to you.
  • Old messages can be gone. Slack's help notes that owners on paid plans can set a retention policy that deletes messages after a set time, and authors can delete their messages. A missing result does not prove it was never said.
  • Do not rely on search for compliance records. If you need a formal record of a decision, keep it where your organization stores records.
  • Respect privacy. Searching for a colleague's old messages is fine for work. Do not dig through other people's conversations for unrelated reasons, and follow your workplace's rules.

Sources

Checked October 16, 2026. The list of search modifiers and filters follows each product's own help articles. The routine and cautions are our suggestions.