When we work with a Data Entity in D365FO, it can get tricky to track how transfers are going and how much is left. Here is a quick SQL snippet to query staging tables to figure out DMF TransferStatus:
select executionid, transferstatus, case when transferstatus = 0 then 'Not started' when transferstatus = 1 then 'Completed' when transferstatus = 2 then 'Error' when transferstatus = 3 then 'Validated' when transferstatus = 4 then 'Duplicate' end AS StatusTxt, count(*) from [dbo].[CUSTCUSTOMERV3STAGING] group by executionid, transferstatus
This snippet can tell us how many records have been completed, has an error, or still remaining to be processed. It only works if a staging table is being used for the data entity export/import.