After you install the Connectorly managed solution, every time you create an Invoice in Microsoft Dynamics 365 our Xero Details shadow entity will be created. The connector uses this entity to determine which invoices are ready to be synchronised.
Invoices created before the managed solution will not be synchronised and this is by design, as we didn't want the possibility of many thousands of old Microsoft Dynamics 365 invoices being synchronised into Xero the first time the connector was installed.
You can generate the required Xero details record for an invoice that was created before the solution was installed.
Generate the Xero details record for an invoice
Open the invoice
Click on Flow
Select Connectorly - Create Xero details record
Refresh the page and your invoice now ready to be synchronised