I have tried the following in order to reset my Identity Seed of a column:
DBCC CHECKIDENT (\'dbo.Stuff\', RESEED, 0)
This does not work in
I think @haldyr's answer was probably unfairly deleted as its correct.
The latest version of SQL Azure (v12) DOES support DBCC CHECKIDENT
(and a bunch of others) however if your azure database server isn't brand new you will need to upgrade.
Upgrading is easy, go to your azure DB Server on the new portal (the actual server not the DB itself) and click the big Latest Update
button.
NOTE: Be aware there are a bunch of caveats to upgrading (Like some older stuff doesn't support it), so its worth reading the article http://azure.microsoft.com/en-us/documentation/articles/sql-database-preview-whats-new/#V12AzureSqlDbPreviewGaTable