ModifiedBy and ModifiedDateTime fields of User record(userinfoTable).

Hi

I was developing a report with User, user permissions, its corresponding worker and assigned position details. For this report I need to add Modified By and Modified DateTime fields of User record.

I enabled Modified Date Time and Modified fields on SysUserInfoTable.

In DP class I tried two scenarios

1) Getting sysuserinfo ModifiedDateTime and ModifiedBy fields

when I change username in User form its not updating in ModifiedDatetime field, the field value is remaining same as createdDateTime field. I changed the user relation on user then sysuserinfo ModifiedDatetime field is updated with latest value.

1) Getting Userinfo ModifiedDateTime and ModifiedBy fields

I was able to get the right  ModifiedDatetime, ModifiedBy fields when I change values like user name and email etc but the issue here is its displaying ModifiedDatetime, ModifiedBy values only from today, the user information that I changed yesterday is displaying changed name but ModifiedDatetime, ModifiedBy values were showing blank ideally they should display yesterday date and time and Modified by user Id. 

Am I missing any step here or is there a better way of getting USER record created by, createddateTime, ModifiedDatetime and  ModifiedBy values.

I am using AX 2012 R3 and the report purpose is for User permissions and worker records auditing.

Thanks