It says Xero (or my mailbox) needs reconnecting.

Xero, Sage or your mailbox stopped accepting TruDues' connection — for example a Xero demo company expired, or an email or app password changed. Go to Settings → Accounting platform (or Settings → Email) and press Reconnect. Nothing is sent while it needs reconnecting; your costs are safe and can still be checked.

More in Accounting software

• Which accounting platforms does it work with?
• Can I connect more than one accounting platform?
• Can someone approve bills before they're sent?
• Can TruDues send costs automatically?
• Can different lines on one invoice go to different ledgers?
• What happens to invoices in other currencies?