Question: Gmail accounts on Mac Outlook and Graph API

Question

Prerequisites

• Can you reproduce the problem?
• Are you running the latest version?
• Are you reporting to the correct repository?
• Did you perform a cursory search?

Description

We have an office outlook add-in and use https://github.com/AzureAD/microsoft-authentication-library-for-js for azure auth along with msgraph to make calls to perform mailbox actions for users in the addin.

Outlook Desktop on Mac allows users with gmail accounts to add them as "exchange" or "supported" accounts not just POP or IMAP. I believe the user has to have a 365 sub tied to the gmail account too. Im not sure what this really means. We don't have the same issue with IMAP or POP accounts because they are not considered exchange accounts and are not allowed to use addins. but these accounts are for some reason. (Im asking about the addin team about the allowance of addins etc.)

As for the graph side of things, I'm not sure if this account type, gmail with 365? not setup as POP or IMAP, should work with graph api or if there is a way I can get this to work for users.

Console Errors: [Is there any console error]

The mailbox is either inactive, soft-deleted, or is hosted on-premise
The specified object was not found in the store., Can't connect to the mailbox of user Mailbox database guid:

Screen Shots

Steps to Reproduce

1. Add gmail account to outlook
2. Authenticate with Azure and authorize access to said account
3. Attempt to call graph API mailbox endpoints against this account

Expected behavior: I'm not sure if this account should work or be allowed or if there is a way I can get this to work for users.

Thank you for your time reviewing this.