Firstly, you can't sync between Prod and Dev, the export functionality don't export all data which make it useless. We created our own export utility and also own import utility to move this data from dev to prod.
The problem now is that as we import thousands of records, all of a sudden the ACS decided that it failed to authenticate the user.
When debugging, the user is authenticated correctly, but as soon as it tries to add/delete records I get the authentication problem.
Please can you explain why this is happening, this is the second time, the first time took lots and lots of my time and at the end I had to wait a week and a half for it to work again, without changing any code.
