Old basic dates should be loaded in the new system for Maintenance Orders

Hi All,

I have the requirement in uploading the Old Maintenance order in the new system with the same old basic date and time.

We are migrating the old ECC 6 system orders into S4 System , so while uploading the Old maintenance order system is not taking the Old Basic dates and Basic finish date.

So can any one help in this , so that we can upload all the Maintenance Order exactly mapping with the Old basic dates and Finish dates.

Kindly reply ASAP.