It is possible to method to tell SQL server to make use of specific default seed value for IDENTITY posts - presuming the (to become run) CREATE TABLE claims don't specify one? I do not worry about changing existing data or changing the seed values for specific IDENTITY posts. I would like exactly the same seed for those recently produced identity posts. Assume I am unable to customize the individual CREATE TABLE claims by any means.

the syntax is:

IDENTITY [ ( seed , increment ) ]

You have to specify both seed and increment or neither. If neither is specified, the default is (1,1). There's not a way to create another global default apart from the (1,1). The only method to set something apart from (1,1) would be to code it around the column.

this is actually the documentation: IDENTITY (Property)

EDIT

According to this command:

DBCC CHECKIDENT ( 'table_name', RESEED, new_reseed_value )

You could utilize this script to totally reset all identity posts towards the same @new_reseed_value value:

DECLARE @Tables table (RowNumber int identity(1,1) primary key, TableCommand sysname)
DECLARE @new_reseed_value     int
       ,@CurrentRow           int
       ,@MaxRows              int
       ,@CurrentTableCommand  nvarchar(4000)

SET @new_reseed_value=9876

INSERT INTO @Tables
        (TableCommand)
    SELECT
        'DBCC CHECKIDENT ( ''['+SCHEMA_NAME( OBJECTPROPERTY( OBJECT_ID, 'SCHEMAID' ))
            +'].['+OBJECT_NAME( OBJECT_ID )+']'', RESEED, '+COALESCE(CONVERT(varchar(10),@new_reseed_value),'1')+' ) '
        FROM  SYS.COLUMNS
            WHERE COLUMNPROPERTY(OBJECT_ID, NAME, 'IsIdentity') = 1
            --AND exclude some tables here ifnecessary
SELECT @MaxRows=@@ROWCOUNT,@CurrentRow=0

WHILE @CurrentRow<@MaxRows
BEGIN
    SELECT @CurrentTableCommand=''
          ,@CurrentRow=@CurrentRow+1
    SELECT 
        @CurrentTableCommand=TableCommand
        FROM @Tables
        WHERE RowNumber=@CurrentRow
    --PRINT @CurrentTableCommand
    EXEC(@CurrentTableCommand)
END