Tally allows you to set user names, passwords and Tally.NET access/Tally SMS authorisations for those users.

Tally Vault lets you secure the company file by prompting you to provide a password without which the entire company file data remains encrypted. Its useless (i.e. the company information) unless you give the correct password. Business owners who want to protect their company from unauthorized access use Tally Vault. Never lose the password otherwise you will also lose the data forever.

Hope that answers your question. If you need to know more let me know