Office365 or CTVmail
Open Admin Portal
Select the User Tab
Change the search type to Fax
Enter the Fax number
Select the user that is assigned to the Fax number
Select Directory Services, then properties
If "Enable Fax Forwarding"i s checked, the copy is being forwarded to the email address in the box
If "Enable Fax Forwarding" is not checked, then the fax will be delivered to the user's voicemail or email account depending on which service is hosted.
Hosted voicemail: default delivery location is the user's voicemail box
Hosted Email: default delivery location is the user's email account.