Why employee acc cannot login

One of the staff cannot open employee cannot but can login using admid acc. How to adjust it? I was deleted the employee detail can canot add it due the duplicate ic no

If there is a Duplicate IC error, that means the employee is not deleted, but “archived”. Just search archived employee records in Employee->Employment Status, and either delete the archive status, or add a new employment status.

For more details, kindly refer to the online user guide.

Additionally, kindly go through the user guide first before asking further questions, as I noticed that ALL your questions were already documented in the user guide, and kindly note that I DO NOT provide hand holding user training.