False() in RLS Security Table

[Hoping]

If the below DAX filter is on the Region table which is a dimension, why should I add FALSE() against Security Table ?

[Region Code] =

LOOKUPVALUE(

       'Security Table'[Region Code],

       'Security Table'[EmailId], USERPRINCIPALNAME(),

       'Security Table'[Region Code], 'Region Table'[Region Code]

)

What happens if I don't add FALSE() but add TRUE() or add nothing and leave it blank? 

[v-tianyich-msft]

Hi @Hoping ,

False means the following rules are not visible, True is visible.You can refer to:Row-level security (RLS) guidance in Power BI Desktop - Power BI | Microsoft Learn

Hope it helps!

Best regards,
Community Support Team_ Scott Chang

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