bitcoind – Multisig synchronization – Bitcoin Stack Exchange

In order to set up a multisig transaction, your bitcoind needs to know the public keys that make up that multisig address, and the order that those public keys are listed in. The address itself doesn’t contain this information. If you already have 1 bitcoind set up with this information, you can use this script to copy that information to a second bitcoind.

Then, once you do that, you can craft a multisig transaction, then distribute that transaction to each of the signers.