There are a couple of ways you can find your MX records; go to https://mxtoolbox.com/ and enter in your Google domain. This site will list all of your mail exchange servers assigned to your domain by Google.
Version 10.5 had the capability to send a copy of the voicemail to Gmail. The user would have to delete the message in Gmail and on the phone.
On 10.5 after bringing up a user, under edit, message actions, voicemail, select Accept and Relay the Messa...
