[SalesForce] Permission Set settings to edit certain fields

The problem was due to the object having two record types with incorrectly configured picklist values. Record Type A had all of the picklist values. Record Type B had none. Not having any is an invalid state. When you try to remove all values from a picklist for a given record type, you'll get the following error:

At least one value must be selected

So, I believe this problem may have somehow been introduced via deployment to the test environment where this problem was found.

By adding the picklist values to Record Type B, the problem was solved.

Most interesting is the fact that regardless of which record type you were editing a record for, the picklist would be disabled, most likely caused by the invalid state mentioned above.

You're missing "full" control of the record.

The levels of control are, in ascending order:

• None
• Read
• Edit
• Transfer
• Full

Each level of control implies the additional permissions that are lower than that, unless prohibited by the profile.

Full control can generally only be granted by:

1. owning the record
2. being a manager of the owner of the record (if enabled), or
3. having Modify All Data for that object (included automatically if you have the global Modify All Data permission).

See the Help & Training modules on Sharing for more details, as well as other answers here on the SFSE.

"Full" control is also referred to as "Owner" permissions when viewed in Sharing, but basically just means "Delete", as that is the only additional permission it grants. You can have Transfer independently of Delete on some objects by Sharing Rules or Organization Wide Defaults, and you're also explicitly granted Transfer when a record is owned by a queue you are a member of or is in the same Territory as you with Territory Management and the appropriate settings.

As an exception to granting Full access, the "Financial Edition" of salesforce.com, used by companies like Merrill Lynch, offers the ability to create sharing rules that grant Full access to a record despite not meeting the usual criteria.