When I add emails to Zoho CRM through the Microsoft Outlook Plugin, why aren't the email attachments added?

When I add emails to Zoho CRM through the Microsoft Outlook Plugin, why aren't the email attachments added?

When you use the Zoho CRM plug-in for Microsoft Outlook, you can only transfer email attachments when the file size doesn't exceed 1MB. If the file size is more than 1MB, the email attachment will not be transferred to Zoho CRM.