Changes to the samaccountname attribute in AD are not being reflected in the integrated UserIDs in TPAM.
Username field of TPAM UserIDs cannot be modified after the initial creation of the UserID.
This is a limitation of the current design of the product. UserIDs, whether they are local users or externally integrated users cannot change their usernames after the initial creation of the account.
An enhancement request has been submitted and planning is underway to allow the username field of integrated users to be modified in an upcoming version of this product.
No ETA is currently avaiable for this request.