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Last updated on Aug 24, 2026
When the QuickBooks Desktop Web Connector can't authenticate a sync, it shows Invalid password for username: qbsync in its Status column. This message comes from the Web Connector application itself, not from Maxio, but it always traces back to Maxio's side of the connection: the password stored for Maxio's dedicated QBSYNC sync account no longer matches what's entered in the Web Connector, or that account has been deactivated.
Every QuickBooks Desktop Web Connector file (.qwc) that Maxio generates for your account is hardcoded to authenticate with a fixed username of qbsync — this isn't something you set or can change. The Password field in the Web Connector is the only credential you actually control, and it maps to one specific Maxio user account literally named QBSYNC. Every computer running the Web Connector against your Maxio account authenticates as this same shared account, so they all use the same password.
When the Web Connector sends its stored username and password, Maxio only starts a sync session if the username is exactly qbsync, the password matches, and that QBSYNC user is active in Maxio. If the password was changed on the Maxio side without updating the Web Connector, or if the QBSYNC user has been deactivated in Maxio, neither condition is met, and Maxio returns the same rejection either way — which the Web Connector displays as the invalid-password message shown above.
You clear this error by making sure the password entered in the Web Connector matches the current QBSYNC password in Maxio, and that the QBSYNC user is active.
To reset the QBSYNC password
If the qbsync row shows as inactive instead, resetting the password won't clear the error until an administrator reactivates that user in Maxio.
Because every Web Connector install shares the same QBSYNC credentials, changing the password in Maxio breaks the sync everywhere else until you update it too. Whenever you reset the QBSYNC password, update the Password field in the Web Connector on every computer that syncs with this Maxio account before the next sync runs, and let anyone else who manages one of those installs know the password changed.
If you're setting up the Web Connector for the first time rather than fixing a broken sync, Setup QuickBooks Desktop walks through generating the connector file and setting the QBSYNC password for the first time.
For the full list of other Web Connector Status-column messages and what causes each one, see QuickBooks Web Connector Errors.
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