You cannot access this right now
        Your sign-in was successful but does not meet the criteria to access this resource. For example, you 
        might be signing in from a browser, app, or location that is restricted by your admin.
        More details

        Error Code: 53003 
        Request Id: a2ae545e-6d4a-40e7-aed8-31e252422900 
        Correlation Id: 0200d612-710e-42ea-82c6-2aa415f3062f 
        Timestamp: 2024-06-06T14:09:39.975Z 
        App name: Thunderbird
        App id: 9e5f94bc-e8a4-4e73-b8be-63364c29d753
        IP address: 136.226.19.80
        Device identifier: Not available
        Device platform: macOS
        Device state: Unregistered

Hi - My company turned on some additional security settings for connecting to M365. Thunderbird Windows successfully provides the needed Entra ID, that is required in our M365 environment now for access by registered devices. The state of the device, as being registered in Entra ID, doesn't seem to be able to be passed via Mac Thunderbird but does for Windows Thunderbird? This is the error - the fact that it shows the Device as unregistered is the key item - Thunderbird needs to be able to send the : You cannot access this right now Your sign-in was successful but does not meet the criteria to access this resource. For example, you might be signing in from a browser, app, or location that is restricted by your admin. More details Error Code: 53003 Request Id: a2ae545e-6d4a-40e7-aed8-31e252422900 Correlation Id: 0200d612-710e-42ea-82c6-2aa415f3062f Timestamp: 2024-06-06T14:09:39.975Z App name: Thunderbird App id: 9e5f94bc-e8a4-4e73-b8be-63364c29d753 IP address: 136.226.19.80 Device identifier: Not available Device platform: macOS Device state: Unregistered Is this something that can be addressed? I am really disrupted by not being able to manage my email through Thunderbird... Bob - ramartin@mitre.org