While playing around cards for Power Apps, I noted that the User Power Fx function that is used in Canvas Apps to detect the current user and get some information about it is not supported.
After some investigation, I found that Cards use a new object called Viewer instead.
How to use the Viewer Object
The viewer object has 3 properties that potentially we could use to filter data by the Current User :
- name: it’s the user Display name
- aadObjectId: ID of the user in Azure AD
- id: weirdly this displays the UPN when loading in the Cards player but it displays something that seems like a Teams identifier when sending the Card in Teams, for example: 29:16a03jETMRncoewiNAeiWgBqzzxv-Rx16996NUHRjgNHW8Bb7449q-Y3ku9-s4a3ZE3AR_e0NQiM-6qx2n3vWIw
Filtering data by the display name can be messy as there could be two people with the same name in the tenant, so going with the aadObjectId would be the most precise way.
Filtering Data
Let’s say you wanted to filter all items…
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More About This Author

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SharePoint and Office 365 Consultant/Developer always trying to get the best from Microsoft stack (Microsoft 365/Azure/Power Platform and related stuff).
Living in Ireland since 2018, I had previously worked in Brazil as a consultant/developer for Office 365, SharePoint and related technologies for almost 10 years.
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