CRM SystemUser Entity Field "Preferred Email"

Question

Hello,
We are using CRM 2013 on-premise. 
We notice there is a field under the SystemUser entity called "Preferred Email" (real name is preferredemailcode).
It is an option set field with "Default Value".
Is there any documentation or does anyone know how this field work? 
Can we create a new value in the option set for a user's preferred email address like [email protected]?
Thanks much for clarifying.
-tri

Answer 1

Hi,
This is what i found in SDK about the "Preferred Email" field .
LogicalName                    
preferredemailcode 
SchemaName                    PreferredEmailCode 
Type                                  Picklist 
RequiredLevel                   None  
IsValidForCreate             
TRUE  
IsValidForRead                 TRUE 
IsValidForUpdate             TRUE  
CanBeSecuredForCreate  FALSE  
CanBeSecuredForRead     FALSE  
CanBeSecuredForUpdate  FALSE 
IsCustomizable                
TRUE 
IsAuditEnabled                 TRUE 
IsManaged                       
TRUE 
IsPrimaryId                     
FALSE 
IsPrimaryName                FALSE 
IsRenameable                  TRUE 
IsSecured                         FALSE 
IsValidForAdvancedFind FALSE 
DisplayName                    Preferred E-mail
DeprecatedVersion 
Description                     
Preferred e-mail address for the user.
Since IsCustomizable  is true, you should be able to modify it.
Hope This helps!!!
Thanks,
Prasad
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