There is a good description provided by Ventortech how to setup 365 mail in odoo in order to make it work. Just look for the blog "Office 365 and Odoo.sh and Odoo Online. How to configure emails". This can help a lot.

However... I already have had the situation, where an additional security level was involved. Due to this we had to setup the 365 mail account and had to make sure, that all emails going out are handled only by this emailadress without the need of "sending on behalf". I could have a look to the history if necessary. 

In General... From my point of view integreating 365 Mail in Odoo can be a pain... but it works.

Hi Boujraf Youssef!

Have you solved this issue by now? Did you try the steps suggested by Mahmoud, regarding the permissions in Office 365 / Outlook?

Dear,

Thanks for your quick answer.

My concern is :

- I have only registered ONE mail server (outgoing/incoming mail server) for the ODOO server.
I am expecting all the email exchange will be performed by this account. The email address used for is : accounting@xxx\.be\.

For\ example\ :

\-\ if\ Digest\ is\ sent\ to\ all\ users,\ it\ is\ done\ with\ accounting@xxx\.be\ account\.

\-\ If\ any\ user\ wants\ to\ send\ any\ message\ to\ different\ user\ registered\ in\ Odoo\ or\ external,\ I\ am\ expecting\ Odoo\ uses\ the\ mail\ server\ registered\ with\ accounting@xxx\.be

In\ my\ setup,\ I\ will\ not\ register\ each\ odoo\ user\ with\ their\ own\ email\ address\ account\.\ Most\ of\ the\ email\ address\ are\ "alias"\ or\ external\.

I\ don't\ believe\ Odoo\ is\ unable\ to\ process\ email\.

Then\ I\ am\ user\ "myself@xxx\.be"\ wants\ to\ send\ a\ message\ to\ "mycustomer@gmail.com" through Odoo. How to setup Odoo to have no issue with on behalf of ?

Best Regards,

Youssef

The error message "SMTPDataError: 554 5.2.252 SendAsDenied; accounting@xxx.be not allowed to send as myself@xxx.be STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied" is indicating that the user "myself@xxx.be" is not authorized to send email on behalf of the email address "accounting@xxx.be".

This is likely because the user "myself@xxx.be" does not have the necessary permissions to send email on behalf of the "accounting@xxx.be" email address.

Here are a few things you can try to resolve this issue:

1. Verify that "myself@xxx.be" has the correct permissions to send email on behalf of "accounting@xxx.be" in the email server (Exchange server or Office 365) that you are using.

2. Check the permissions of the user "myself@xxx.be" in the Office 365 or Exchange server. The user should be assigned with 'Send on Behalf' permissions to the email address accounting@xxx.be.

3. Check the settings of the Office 365 or Exchange server, and make sure that the feature "Send on Behalf" is enabled and configured correctly.

4. Confirm that the email address "accounting@xxx.be" is properly added and verified in the Office 365 or Exchange server, and it should be the default email address for the user "accounting".

5. Try to use the SMTP settings of the email address "accounting@xxx.be" instead of the SMTP settings of "myself@xxx.be" in the outgoing mail server configuration in Odoo.

It's also possible that the issue is related to specific configurations of your Office 365 or Exchange server, and that you may need to consult with your IT department or an Office 365/Exchange administrator to resolve it.