Manager could not see employee's data on MSS

Question

Hello Experts,
One the Manager could not see employee's data on MSS (in iview). Only employee names appearing but not the other details.
We have checked and debugged, the data is populating in the backend but on portal its only displaying employee names.
We have checked the configuration, roles and it is also looking fine. Not sure why it is not displaying data on portal.
Please help. Thank you.
Regards
Saurabh

Answer 1

First off I want to thank you Siddharth for all your responses.  Ultimately, your responses helped me get on the right path for  resolving this issue. 
I ended up taking this into debug and finding out specifically why these absences did not appear on the team calendar.  I'd like to begin by indicating, in my opinion, this is a bug/programming flaw.
Within IF_EX_PT_ABS_REQ~AUTH_CHECK_AND_ANONYMIZE_DATA there was a check to determine if the rule group had the IT2001/2002 Authorization Check section, Employees: Deactivate Authorization Check and Managers: Deactivate Authorization Check boxes checked.  For 1 out of the 3 rule groups configured, one group did not have those boxes checked, while the other two did. 
What happened, is when the program built it's list of PERNA's that report directly to this manager, the first person in the list happened to be in the rule group that did not have the Deactivate Authorization boxes checked.  However, the remaining PERNA's in the list were in another rule group that did have the Deactivate Authorization boxes checked.  Based on my interpretation, the team calendar should have ommitted the absences of the one person, but should have displayed the absences for everyone else in the separate rule group. The code only reads what rule group the first PERNA in the list is and applies that MSS_NO_AUTHCHECK value to all the other PERNA's in the list.
Either the code should do a MSS_NO_AUTHCHECK lookup on every PERNA on the list or should check what rule group the approver/manager is in and apply it to all his employees.
Game - Set - Match.......