My Set up:
Business Central is in commercial tenant.
Emails accounts are in GCC.
Email accounts were set up using SMTP Basic for our users to sent emails from our emails housed in GCC to our customers.
Issue:
I got emails from Microsoft saying that SMTP Basic authentication will be deprecated in 2 months.
So, I switched our email account authentication to OAuth 2.0.
Problem:
After the switch, emails could not be sent.
Attempts to fix:
I created an App Registration in our GCC Tenant with the following:
Then, I set up Email Microsoft Entra application registration in BC.
The Client ID and Client Secrets were from the above "BC SMTP OAuth" App registration in GCC.
I seem to find that no matter that Client Id and Client secret I entered in these boxes, Verify Registration is always good.
Next, I set up an SMTP account in BC like below:
When I use the above account to sent email out in BC, I got the below.
Any suggestion/ideas on what else to check such that I can continue to send emails from GCC emails to our customers within BC, which is in our commercial tenant?
We used to be able set it up to do this when SMTP Basic is used.
I tried to set up SMTP Basic again in BC but failed. The error was 404.
Any ideas/suggestions?
Dan