Steps to Reproduce:
- Create a new User Picker(Multiple User) Custom Field and assign in on Service Desk screen.
- Edit on of the Request Types fields and add the Custom Field.
- Create a new User with a Space e.g. "customer 1"
- Go to Customer Portal and create a request with a Request Type that have the Custom Field.
- Include the "Customer 1" on the field and create the request.
The request will be created