---
id: 3734
title: "We can't set up the conversation because your organisations are not set up to talk to each other"
source_domain: projectblack.io
source_url: "https://projectblack.io/blog/we-cant-set-up-the-conversation-because-your-organisations-are-not-set-up-to-talk-to-each-other/"
published_at: "2025-08-01 00:02"
tags: ["collaboration", "troubleshooting", "microsoft-teams", "external-access", "m365"]
phying_url: "https://phying.com/item/3734"
lang: en
---

# We can't set up the conversation because your organisations are not set up to talk to each other

## Summary

Troubleshooting the Teams cross-org chat error: it stems from the External access setting, and the fix is usually adding the other organisation's domain to the allow list in the Teams admin center.

## Intelligence Metadata

- **Sources:** projectblack.io
- **Published:** 2025-08-01 00:02
- **Original:** https://projectblack.io/blog/we-cant-set-up-the-conversation-because-your-organisations-are-not-set-up-to-talk-to-each-other/
- **Phying News:** https://phying.com/item/3734