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SMTP Error when trying to connect Microsoft Office 365 Email

If you are getting an SMTP authentication error when trying to connect your Microsoft 365 (M365) account, you will need to check to see whether you have SMTP authentication enabled.  Please follow the steps below, and you will need to have Administrative privileges in your M365 account, so if you do not have these, you will need to ask your M365 Administrator to do this for  you.
  1. Log in to Microsoft 365 admin center and go to Users > Active Users.
  2. Select the user whose email ID is used to integrate with Zoho CRM, click Mail in the side pane that pops out.
  3. Click Manage Email Apps in the Email apps section.
  4. Select Authenticated SMTP setting if it is not already selected.
  5. If the option is already selected, unselect and select again.
  6. Click Save Changes.
For more information about this error, click here.
 
If you still have issues, please reach out to our support team.