Hi All,

just to let you all know, I am new to salesforce B2B lightning experience.

I recently joined this group, not sure if this question was addressed already if so please refer me to the post.

Assuming Product has a  custom field "brand__c".

working on a requirement where I need to restrict portal user to Add Item(Product) to the Cart if there is already different Brand product exist in the Cart and allow portal user to add Items(same brand products) to the Cart.

is there a OOTB solution out there to accomplish this requirement?