Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi, Mateen Ahmed1
Good morning!
Thank you for publishing in Microsoft Community. We are happy to help you.
According to your description, the problem of your concern is that you've got an error while setting up Email Parameters in Dynamics 365FO.
As Microsoft has a specific support channel resource for certain different support scopes and attributes. For our cmmunity team that we're dealing with Exchange Online issues. Thus, we would like to refer you for the specializing team who dedicating into Dynamics 365 with rich experience and more resources than us.
Here is our dedicated channel to make your query: Explore Dynamics 365 forums
Thank you for your precious time and your understanding would be greatly appreciated.
Have a nice day
Alex | Microsoft Community Moderator.