[Value] MCALL sp_MSupd_ table -or- MCALL custom_stored_procedure_name [Description] 
Calls a stored procedure taking MCALL style parameters. To use this method of replication, use schema_option to specify automatic creation of the stored procedure, or create the specified stored procedure in the destination database of each Subscriber of the article. custom_stored_procedure is the name of a user-created stored procedure. sp_MSupd_table contains the name of the destination table in place of the _table part of the parameter. When destination_owner is specified, it is prepended to the destination table name. For example, for the ProductCategory table owned by the Production schema at the Subscriber, the parameter would be MCALL sp_MSupd_ProductionProductCategory. For an article in a peer-to-peer replication topology, _table is appended with a GUID value. Specifying a user-created stored procedure is not allowed for updating subscribers.