On investigation for case 21724666-1:
It's observed on CA Service Desk Manager Full License - MULTI-PLATFORM release 12.5 that we cannot save preferences by any other roles except Administrator.
Logged in as user A belonging to tenant A
In the Role "Level 1 Analyst" which has Write Access to tenant A, we can
change the Preferences.
When switched to "Level 2 Analyst" which does NOT have Write Access to
tenant A, then we CANNOT change the preferences.
So, every role should be able to edit/ save preferences but this functionality is missing.
The buttons Save Cancel Reset are only present when we view preferences by Administrator role. Not present in any of the rest roles.