问题
There is a custom entity E. I would like to add a lookup field on E, a reference to a record of type Contact or Account (that is, a Customer/Party).
For example, there is such a field on the Case entity, "customerid" (of type Customer).
The alternative (which is what I would do on a 'plain' SQL database) would be to add two fields: ref_contact, ref_account.
Thank you in advance!
回答1:
you can't create lookup field to multiple entities in CRM. By default CRM has two specific multi-entity lookups: Customer and PartyList. Check this article for details.
来源：https://stackoverflow.com/questions/13526645/how-to-create-a-field-of-type-customer-in-dynamics-crm-2011