The Enterprise Vault Domino Gateway must be a Windows server that is running the following minimum software versions:
Depending on which versions of Domino Server and Lotus Notes you use, you may require Lotus hotfixes.
For details of all supported software versions and the required hotfixes, see the Enterprise Vault Compatibility Charts (http://entsupport.symantec.com/docs/276547).
You need at least a Domino Messaging server license for each Enterprise Vault Domino Gateway.