We have a web-to-lead setup to create a new lead whenever a new Quote Request is made by web visitors regardless of where an email already exists in our SF instance. A new lead received from an existing customer will be treated as a new lead, and we would like to assign those existing customers to the same owner who service them before.

We've written a "before insert" trigger to search Account, Contact and non-converted Lead; and assign the newly created lead to the original owner. The trigger is working fine (from reviewing debug log).

We also have a Lead Assignment Rule, which uses "Lead Number" and "Round Robin ID" to assign leads to a selected few sales reps. The round robin rule works fine for new leads (non-duplicating email addresses), but for those existing emails assigned by the trigger (above) is reassigned by the Lead Assignment Rule.

Is there a way to create a Lead Assignment Rule, which bypasses the assignment if Owner already exists? We would like to keep the owner if it is already assigned by a trigger, and only assign via Round Robin rule if no owner is assigned by the trigger.

Any pointer is greatly appreciated.
 

We have a web-to-lead setup to create a new lead whenever a new Quote Request is made by web visitors regardless of where an email already exists in our SF instance. A new lead received from an existing customer will be treated as a new lead, and we would like to assign those existing customers to the same owner who service them before.

We've written a "before insert" trigger to search Account, Contact and non-converted Lead; and assign the newly created lead to the original owner. The trigger is working fine (from reviewing debug log).

We also have a Lead Assignment Rule, which uses "Lead Number" and "Round Robin ID" to assign leads to a selected few sales reps. The round robin rule works fine for new leads (non-duplicating email addresses), but for those existing emails assigned by the trigger (above) is reassigned by the Lead Assignment Rule.

Is there a way to create a Lead Assignment Rule, which bypasses the assignment if Owner already exists? We would like to keep the owner if it is already assigned by a trigger, and only assign via Round Robin rule if no owner is assigned by the trigger.

Any pointer is greatly appreciated.