Hi Tully
If the Account ID on a contact record is Required, CRM can "assume" that all contact records were created with an Account ID. On the account form, there would be no need to associate an
existing contact record with the account because all of the contacts should already have an account (it was required at the time of adding the contact record, right?). Well a workflow that creates contact records can ignore or override the
required property on the Account ID field. Then when you find you need to associate these new contact records without an account to an account, you don't have the option because the add existing button is gone.
The only solution I've found in a very similar situation is to make the Account ID field business recommended. Then you will have to run regular searches for Contacts without an account as part of system qa routines and update them accordingly.
JRB
