Outlook Not Sending Emails in Office 365 (Fix Guide)

If Outlook is not sending emails in Office 365, you may be dealing with a connection issue, profile error, or incorrect account settings. This is a common problem in workplace environments and can usually be fixed with a few simple steps.

Quick Checks Before Advanced Fixes

  • Make sure Outlook is connected to the internet
  • Check if Outlook is in Offline Mode
  • Restart Outlook
  • Restart your computer
  • Confirm your email account password is correct

Fix 1: Turn Off Work Offline Mode

  1. Open Outlook
  2. Click the Send/Receive tab
  3. Make sure Work Offline is not selected
  4. If it is highlighted, click it to turn it off
  5. Try sending the email again

Fix 2: Repair Outlook Account

  1. Open Outlook
  2. Click File → Account Settings → Account Settings
  3. Select your email account
  4. Click Repair
  5. Follow the on-screen instructions

Fix 3: Check Outlook Data File

  1. Close Outlook
  2. Open Control Panel
  3. Click Mail
  4. Select Data Files
  5. Make sure the correct data file is set as default

When to Contact IT Support

If Outlook still does not send emails after trying these steps, the issue may be related to your Office 365 license, mailbox settings, or server configuration. In workplace environments, it is best to contact your IT support team for further investigation.

Final Thoughts

Outlook not sending emails in Office 365 is a common workplace issue that can usually be resolved by checking offline mode, repairing the account, or verifying the correct data file. Follow each step carefully to restore normal email functionality.

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