Office365 Error: Unable to get SMTP email
During MS Outlook or Office 365 integration via IMAP-OAUTH or POP3-OAUTH protocols, if you encounter the following errors, please follow the respective steps to resolve them.
Error: Unable to get SMTP email

Steps
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.
If the option is already selected, unselect and select again.
5. Click Save Changes.
Zoho KB
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