I'm facing an issue while creating a Contact from an Experience Cloud site using an Apex controller.

Current Scenario

• The logged-in user is an Experience Cloud Customer Community Plus Login user.
• The Contact is created through an LWC that calls an Apex method 
• The Apex controller is declared as public 
• The Contact is populated with all the required fields, including the AccountId of the logged-in user's Account.

Behavior Observed

1. If OwnerId is not assigned

• Salesforce automatically assigns the logged-in Experience Cloud user as the owner during the insert.
• Since the logged-in user is an external user, the insert fails because saying "portal users cannot own Contact records."

2. If OwnerId = UserInfo.getUserId()

• The same error occurs because the logged-in Experience Cloud user becomes the owner, which is not allowed.

3. If OwnerId is explicitly assigned to an internal Salesforce user

• The insert fails with: INSUFFICIENT_ACCESS_ON_CROSS_REFERENCE_ENTITY
• This appears to indicate that the external Experience Cloud user is not permitted to assign ownership to another user.

#Experience Site  #Apex