MItel 3300 Forward Voicemail to Office 365

We migrated from an in house Exchange server to Office 365.  Since then, I cannot get my Phone system (Mitel 3300) to forward voicemail to email.  I have setup a relay on 365 (I think correctly).  I have tried many different settings on the phone system itself, it seems to be a very generic setting for forwarding email.  I am testing with my account, I am the admin for all Office 365 mailboxes.
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jfeslerConnect With a Mentor Author Commented:
Found a temporary solution.  I had to use the IP that resolved to
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