Make sure your Avaya phone system has been setup with a routeable DNS Server per http://pariswells.com/blog/random/avaya-ip-office-default-gateway

Create a user in 365 with a License 

On the IP Office under the SMTP Tab put the following:
Server Address – smtp.office365.com
Port – 587 – Mine was intermittently working with 25 so I switched it and it has worked on 587.
Email From Address – voicemail@company.com
Use STARTTLS – Checked
Server Requires Auth – Checked
Username – adminaccount@company.com
Password – admin accounts password
Use CRAM-MD5 – Unchecked

Tags: 365, Avaya Phone System, email, settings, voicemail

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