Microsoft CRM 4.0 form attribute mysteriously read-only

I've inherited a customization of Campaign Response in which the Customer attribute is read-only on the form (in both create and update modes), and I can't figure out why. The form has no OnLoad javascript, the attribute "customer" (which is a partylist) is Searchable, and the field-level behavior for the attribute on the form has "Field is read-only" unchecked. The a开发者_如何转开发ttribute is read-only even for the System Administrator, so it's not an authorization issue.

What else could be making this field read-only?

Thanks,

Phil

First I'd make sure that entity is published. Could be that someone made the change, and then didn't publish the entity.

Second, it is possible that there could be some unsupported changes to the environment. Off the top of my head, they could be attaching javascript to the form via an http module, or modifying the form html by making it locked down, again through an http module. I'd check for any non-native http modules added to CRM's web.config, and I'd also poke around to see if there were any entities that look like they'd be configuration entities for locking/hiding fields. We often do something like that, though in a supported way.

After giving up on Microsoft's support, which was absolutely abysmal, I paid an outside consultant to look into this.

He compared my exported customization to his, and found that, in my exported XML, the Customer field in the Campaign Response form had no LookupTypes, whereas his had 3 LookupTypes:

<LookupType id="f953c2fa-2241-db11-898a-0007e9e17ebd">1</LookupType>
<LookupType id="fa53c2fa-2241-db11-898a-0007e9e17ebd">2</LookupType>
<LookupType id="fb53c2fa-2241-db11-898a-0007e9e17ebd">4</LookupType>

LookupTypes 1, 2, and 4 were exactly what should be there for Account, Contact, and Lead for the Customer of a Campaign Response.

So I added those 3 lines to my XML, imported and published, and now the Customer is enabled and apparently fine.

I would love to know how these LookupTypes could have gone missing in the first place. But at least I've got the default functionality back.