You can use the Public Folder replication scripts that comes with Exchange 2010 to do this.
Open the Exchange Management Shell > change directory to \Program Files\Microsoft\Exchange Server\V14\Scripts
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA).
For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651
If you want to manage em…