QuickBooks connection expired or disconnected

Symptoms: sync fails with "QuickBooks disconnected — please reconnect" or "invalid_grant / Incorrect or invalid refresh token", a red banner appears at the top of the app, the QuickBooks card shows Needs reconnect, and Owners/Admins receive a "reconnect QuickBooks" email.

Ledgerzoom renews QuickBooks access automatically every day. While QuickBooks needs reconnecting, nightly syncs for that company are paused (not retried every hour).

Fix

1. Settings → Connections → Reconnect QuickBooks (or Disconnect then Connect).
2. Pick the same QuickBooks company as before.
3. Click Sync now.

Causes include the QuickBooks user losing admin access, access being revoked from the Intuit app list, or 100+ days without use. Mappings are kept when reconnecting to the same company.