Hi TK,
Thank you for your participation in the BETA! You're the first person to post your feedback, and we really appreciate it.
I tested out this functionality, and i'm afraid I wasn't able to replicate this issue. I created a new SmarterMail account and added it to Outlook (MS365 version) successfully.
As the first troubleshooting step, can you please check the user in SmarterMail to ensure they have MAPI & EWS enabled? If this setting isn't enabled in User Defaults, the new user would have been created without this feature enabled. To check the user:
- Log into SmarterMail as the System Administrator.
- Click on the Domain and go to the Accounts tab.
- Edit the user. On the Service Access card, enable MAPI & EWS, as seen below:

If MAPI & EWS was already enabled, please attempt the Outlook connection, and provide a screenshot of the error your receive.
Finally, you can also look in the Administrative logs for more information:
- Log into SmarterMail as the System Administrator.
- Click on the Manage icon, then select Troubleshooting from the navigation pane.
- Click on View Logs.
- Change the log type to Administrative and Search the logs. You should see a line like this:
[2022.12.12] 08:45:47.216 [IP REDACTED] MAPIEWS Attempting to login user: newaccount@domain.com- Successful connections will show this log line next:
[2022.12.12] 08:45:47.216 [IP REDACTED] MAPIEWS Login successful: With user newaccount@domain.com
- Please provide this log entry for your Outlook connection attempts.
Kind regards,