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Puja Patil 13Puja Patil 13 

How to change datatype of standard field of task

I have to change the datatype of "Releted To" field of "Task" object.
i.e. What id of task. This is lookup field. and i want only 3 objects i.e. Account, Contact, Opportunity.

Hi Puja,

'Related To' is a standard field and you cannot change the data type for standard fields. You can do one thing you can create three lookups on task with referecne to said objects and can put validation rules, so at the same time user can select only one lookup (Account/Contact/Opportuntiy)