This did not do it for me:
select dbo.GetNextBusinessDay(getdate(),1)
select dbo.GetNextBusinessDay(getdate()+1,1) -- Fri
select dbo.GetNextBusinessDay(getdate()+2,1) -- Sat
select dbo.GetNextBusinessDay(getdate()+3,1) -- Sun
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2007-04-27 12:41:00
(1 row(s) affected)
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2007-04-30 12:41:00
(1 row(s) affected)
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2007-04-29 12:41:00
(1 row(s) affected)
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2007-04-30 12:41:00
(1 row(s) affected)