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Validate values selected in a multi select drop down



I am creating a canvas app for User access management of a specific application. User enters details into a form which stores data in a SharePoint list and then an approval mail is triggered and upon approval the application support team provides users access to the application based on data stored in SharePoint list .


There is a Security groups field which specifies which group the user wants to be added in the application (I have kept the security group field as Multi select Drop Down). Users can only request access to security groups based on the below matrix:


For example, A user can only request for access in the security group FO, TE and MO but not BOS, BOC or BOA.


I want to show an error message if a user selects security groups other than the above mentioned rules.


Is there a way in powerapps to validate the selection?


Thanks in advance.

Super User
Super User

Your matrix doesn’t make sense because it has the same categories on the top and the side. Is there some kind of user association with a group that can be used for validation?


if there is, why not just present the valid options to the user in the drop down? If there is a list or something that can be used to validate the appropriate groups, you can use that same logic to build the list of options for the app when the user runs the app

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