Data visibility issue of a service account in a grid.

Hi Appian Experts,

Need your help regarding the data visibility.

There is a scenario where our business users are not able to see the full name of a service account in a grid that is getting data from a database via a Sync disabled record, whereas the Application designer can see the full name of that service account via a following code. We have added the service account in the business group, still it didn't works. 

if(
or(
a!isNullOrEmpty(
ri!user
),
not(
isusernametaken(
ri!user
)
)
),
ri!user,
user(
ri!user,
"firstName"
) & " " & user(
ri!user,
"lastName"
)
)