If the main Stellar account has multiple signers, you may see a message on the 'Success' screen that more signatures are needed for the transaction to occur on the Stellar Network.
In most cases, this means that other signers for the main account should provide their signatures by 'Confirming' the transaction.
Such transaction will not occur on the Stellar Network until it is signed by all signers including the main account.
If you are using LOBSTR Vault paired with LOBSTR wallet, StellarX, StellarTerm or Stellarport, all signers will be notified of the transaction 'sign' requests automatically.
In case you need more signatures, the 'Success' screen will also display a Transaction XDR.
You may treat this string as the desired transaction signed using the secret key of your LOBSTR Vault account.
You can copy a Transaction XDR and provide it to other signers if there are issues with the transaction not appearing in LOBSTR Vault automatically.