Annotation migration using "CRM Configuration Migration" tool

Hi,

I want to migrate data from On Premise CRM to Online version. I use the configuration migration found in the CRM SDK.

Dates (CreatedOn, ModifiedOn) are lost during this process. I found a workaround based on e plugin that copy dates and update them during migration. That work fine with PhoneCall or Task. The problem is that it’s not possible to add a custom field to Annotation Entity.

Is there any solution to maintain the dates during migration or to be able to add custom field in annotations??

Thanks.