A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Hello, @James James
Welcome to the Microsoft Q&A platform!
Your customer is likely facing a permissions issue in Outlook.
To resolve this, ensure they have the necessary permissions to send emails, verify the "From" address settings, and check if their email account is configured correctly in Outlook, including verifying SMTP server settings and ensuring authentication is used for sending emails. Additionally, clear cache and cookies if using Outlook on the web, update the Outlook application, and check for any account-specific issues like mailbox quotas or blocked accounts.
If this is an organizational email account, the user should confirm with their IT department or email administrator that they have the correct send permissions. Also, consider the possibility that an antivirus program or firewall might be interfering with outgoing emails; temporarily disabling these can help determine if they're the cause.
If the answer is helpful, please click on “Accept answer” as it could help other members of the Microsoft Q&A community who have similar questions and are looking for solutions.
Thank you for your support and understanding.
Best Wishes,
Alex Zhang