diff --git a/infra/bicep/main.bicep b/infra/bicep/main.bicep
index b4769741..f27de9c9 100644
--- a/infra/bicep/main.bicep
+++ b/infra/bicep/main.bicep
@@ -19,8 +19,8 @@ param tags resourceInput<'Microsoft.Resources/resourceGroups@2025-04-01'>.tags =
 var solutionLocation = resourceGroupLocation
 var baseUrl = 'https://raw.githubusercontent.com/microsoft/Build-your-own-copilot-Solution-Accelerator/byoc-researcher/'
 
-@description('Optional created by user name')
-param createdBy string = empty(deployer().userPrincipalName) ? '' : split(deployer().userPrincipalName, '@')[0]
+@description('Tag, Created by user name')
+param createdBy string = contains(deployer(), 'userPrincipalName')? split(deployer().userPrincipalName, '@')[0]: deployer().objectId
 // ========== Resource Group Tag ========== //
 resource resourceGroupTags 'Microsoft.Resources/tags@2021-04-01' = {
   name: 'default'