Any way to keep Copilot always open in the sidebar?

Unfortunately, current versions of Edge do not provide a supported option to open the Copilot pane automatically every time the browser starts. The old Always show sidebar setting has been retired, so instructions that depend on it no longer work.

You can still make Copilot easier to access:

1. Open Edge Settings > Appearance.
2. Make sure the Copilot button is displayed on the toolbar, if that option is available.
3. Click the Copilot button to open the pane.
4. If the pane includes a Pin button, use it to keep the pane open while you browse in that Edge window.

Pinning the button or pane does not guarantee that the pane will reopen after Edge has been completely closed. The Continue where you left off startup option restores tabs, but it normally does not restore the open state of the Copilot pane. Adding Copilot as an Edge startup page also opens it as a normal tab rather than in the sidebar.

There does not appear to be an Edge policy that forces the Copilot pane to open at startup. Administrator policies can control whether Copilot is available, but not automatically open it for every session. Registry methods written for the previous sidebar are no longer dependable.

If you need Copilot to remain visible all the time, the more reliable workaround is to open Microsoft 365 Copilot as a separate Edge app:

1. Open Microsoft 365 Copilot in Edge.
2. Open the Edge menu and select Apps > Install this site as an app.
3. Launch the installed Copilot app and pin it beside Edge using Windows Snap Layouts.
4. Pin the app to the taskbar for quick access.

That is not technically an Edge sidebar, but it remains available beside the browser and is less likely to be affected by future sidebar changes.