Hi @jayesh110283 ,
No simple answer.
If your customer has E3 and E5 licensing, Power Automate will be included along with standard connectors. This will get you through most scenarios involving SharePoint, Excel and business logic e.g. loops, conditions etc.
If your customer's SPD workflows requires additional connectivity e.g. SQL, web service etc, then you will need premium connectors which will require either a per flow or per user license. It is possible to minimise costs by using service accounts but again, it depends on the scenario.
I haven't looked at SPD workflow for a while but from what I recall, the functionality is limited so I think standard connectors should be fine. If your customer had custom workflows built in Visual Studio/WF or used a third party tool e.g. Nintex/K2, then that would be tricker.
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