i believe the calculated column has to be dropped and recreated as a new calculated column.
i just tried this as a proof of concept, and I get a syntax error on the ALTER command:
create table Example(exampleID int identity(1,1) not null primary key,
myCalculatedColumn as exampleInt * 2 )
--syntax error, so this format is incorrect.
alter table Example Alter Column myCalculatedColumn as (exampleInt * 2 + 10)
--help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!