how to make employee mandatory to attend 9hr office or else mark as absent

Summary:

We have requirement where employee need to attend office 9 hr or else mark as absent but we don't have payroll or timecard implemented.

we only have absence management and one custom holiday calendar for employee where in and out time is mentioned so how we can achieve this requirement any one can help me on this.

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):