SQL Backup - Access Denied

We moved the server that Backup Exec is on to a new domain and ever since, our SQL backups are getting the error below. Before moving this server to a new domain, the backup was around 17GB each day and since running it on the new domain, it's around 35-40GB before giving me the error. Is this something that needs changed in Backup Exec or SQL itself? This is Backup Exec 2012. Thank you.

 

(Server: "servername") (Job: "Daily SQL Backup-SQL Backup-Full (Runs every weekday)") Daily SQL Backup-SQL Backup-Full (Runs every weekday) -- The job failed with the following error: Access is denied (MS SQL backup).