Providers — Microsoft 365 Copilot (BizChat)

copilot-m365-web (alias m365copilot) sends OpenAI-format chat requests through an authenticated Microsoft 365 Copilot BizChat browser session at m365.cloud.microsoft/chat. This is an unofficial integration.

New to Web Cookie providers?

Read docs/getting-started/WEB-COOKIE-GUIDE.md for the general setup process, authentication guidance, limitations, and troubleshooting before following this provider-specific guide.

Important: The credential for this provider is not a cookie. Do not copy cookies from m365.cloud.microsoft. The credential is a WebSocket URL query parameter and path segment, both read from the DevTools Network tab.

Prerequisites

• A Microsoft 365 account with access to BizChat at m365.cloud.microsoft/chat
• A Chromium-based browser (Chrome, Edge) for DevTools WebSocket inspection
• A M365 Copilot license (included with many Microsoft 365 Business/Enterprise plans)

Credential capture (WebSocket method)

1. Sign in at https://m365.cloud.microsoft/chat and start a conversation.
2. Open DevTools → Network.
3. Filter by WS (WebSocket).
4. Click the Chathub WebSocket connection. Look for a URL beginning with wss://substrate.office.com/m365Copilot/Chathub/.
5. From its Request URL, copy:
   • The access_token query parameter value (a short-lived JWT).
   • The Chathub path segment after /Chathub/ (e.g. <oid>@<tenant>).

The full URL has the form:

wss://substrate.office.com/m365Copilot/Chathub/<oid>@<tenant>?...&access_token=<jwt>

6. In OmniRoute, go to Providers → Add Provider, select Microsoft 365 Copilot (BizChat), and paste the credential in the format:

access_token=<jwt>; chathubPath=<oid>@<tenant>

7. Click Test Connection and Save.

Credential capture (HAR import)

Instead of manually copying values from the WebSocket URL, you can export a DevTools HAR file:

1. Open DevTools → Network.
2. Start or continue a BizChat conversation (this triggers the WebSocket connection).
3. Right-click in the Network panel and select Save all as HAR with content.
4. In OmniRoute, use the Import .har file button on the provider connection dialog.

OmniRoute scans the HAR for the Chathub WebSocket URL, extracts the access_token and chathubPath, and populates the credential fields automatically. The HAR import decodes the JWT expiry and shows the remaining token lifetime.

Never commit a real HAR export, access token, or refresh token. Test and documentation values must always be placeholders.

Token lifetime and refresh

The access_token is short-lived (typically ~75 minutes). After expiry, the provider reports a connection error and you must re-capture the credential.

Automatic refresh with refreshToken

To avoid manual re-capture, you can store a Microsoft refresh token in the connection’s Advanced Settings → providerSpecificData:

Field	Description
refreshToken	Microsoft OAuth refresh token for substrate.office.com/sydney scope
tier	individual (default), edu, or enterprise

Obtain the refresh token from a Microsoft device-code or authorization-code flow scoped to substrate.office.com/sydney. With refreshToken set, OmniRoute pre-flight-refreshes the access_token before each request, so you do not need to re-capture after every ~75-minute expiry.

If refreshToken is not set, you must re-capture the WebSocket credential manually after each expiry.

Tier selection

Tier	Alias	Surface
individual	(default)	Consumer M365 Copilot
edu	included	Education M365 Copilot
enterprise	work	M365 Copilot for Work

Set the tier in Advanced Settings → providerSpecificData → tier. The tier affects the BizChat routing and model access.

Security model

• Unofficial integration. This provider reverse-engineers the BizChat WebSocket protocol. It may break without notice when Microsoft changes the endpoint.
• The subscriptionRisk: true flag reflects that the integration relies on an undocumented endpoint. Account restrictions are possible but not confirmed.
• The access token is a short-lived JWT. Treat it like a password: do not commit, log, or share it.
• The refresh token grants长期 access to the BizChat surface. Store it with the same care as an API key.

Troubleshooting

Authentication fails immediately

• Verify you copied from the WebSocket URL, not from an XHR/Fetch request. The credential is in the access_token query parameter of the Chathub WebSocket connection — not in an Authorization: Bearer header.
• Ensure the chathubPath includes the full <oid>@<tenant> segment from the URL path.

Token expires after ~75 minutes

This is expected. Without a refreshToken, the access token is short-lived. Either:

• Re-capture the credential from DevTools, or
• Configure a refreshToken in Advanced Settings for automatic refresh.

Test Connection passes but chat returns 401

The token may have expired between validation and the first request. Re-capture a fresh credential.

Copilot does not appear in the provider list

Ensure copilot-m365-web is enabled in Dashboard → Providers. The provider may be hidden by default in some tiers.

References

• Issue: #12779
• Discussion: #12756
• Source: src/shared/constants/providers/web-cookie.ts (provider definition)
• HAR import: src/shared/utils/m365HarImport.ts
• Credential fields: src/shared/providers/webSessionCredentials.ts
• Tier modal: src/app/(dashboard)/dashboard/providers/[id]/components/modals/m365Tier.ts

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OmniRoute source repository (a58000c7685f)