PDF & sub-folders lost their createdBy & ModfiiedBY value when migrated from file share to SP online

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Thuyavan Ganesan wrote:

Please have a look at this below forum . The user information must be preserved loaded during migration mapping to the destination. 

 

https://sharepoint.stackexchange.com/questions/207428/sharepoint-migration-and-invalid-modified-by-created-by-users-update

 

Thanks,

Thuyavan

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Thuyavan Ganesancan you please advice more on your reply?  i did not get what do you mean by "The user information must be preserved loaded during migration mapping to the destination. "??

now in my case i can see the PDFs' and sub-folders' Owner fields inside the file share. and i have noted this for all the PDFs and sub-folders, is that inside the File shares, they do not have any values for the "Authors" fields, but they only have values for a  field named "Owner",as follow:-

now i am not sure if these facts are casing the problem i am facing, because i test the migration on another tenant, where the PDFs and sub-folders also have empty values for the "Authors" fields, but when i did the migration, the modified-by and created-by fields inside the sharepoint document library will be equal to the file share Owner's values without any issues...

also inside the migration tool i can specify to map any unresolved user/s to an specific user/s inside office 365 (let say userA). and when i did so , all the PDFs and Sub-Folders got the specified user (userA) inside their modified-by and created-by fields.. so this can indicates that the issue is that the share-gate tool is not able to resolve the users inside the Owner's fields for the PDFs and sub-folders for a reason or another,, although those users are active users inside office 365..