Can not receive emails on Outlook 365

Jeff Wittern 0 Reputation points
2026-09-09T01:28:07.43+00:00

I have not been able to receive emails on Outlook 365 since Friday the 4th at 1030 AM. This is a business account and I need my email!

Exchange Online
Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

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  1. AI answer

    2026-09-09T01:28:22.03+00:00

    For a business Exchange Online account that stopped receiving mail, use this order:

    1. Confirm whether the issue is only in Outlook or affects the mailbox itself.
      • Sign in to Outlook on the web.
      • If new mail appears there, the mailbox is working and the issue is with the Outlook client.
      • If mail does not appear there either, this points to a mailbox, tenant, or service-side issue.
    2. Check Outlook connectivity status.
      • In Outlook, look at the bottom status bar.
      • If it shows Disconnected, Working Offline, or Trying to connect…, Outlook is not connected to the mail server.
      • On the Send/Receive tab, select Work Offline to switch back online, then try Send/Receive again.
    3. Force a manual sync.
      • On the View tab, select Sync.
      • Watch for the status message at the bottom of the message list while Outlook syncs.
    4. Verify internet access.
      • Open a browser and test a public site such as Microsoft or Bing.
      • If those do not load, fix the network connection first.
    5. Check whether mailbox storage is full.
      • If Microsoft cloud storage is full, Outlook cannot send or receive email.
      • Check mailbox storage and clear space if needed.
    6. Make sure Outlook and Windows are fully updated.
      • Out-of-date Outlook or Windows can prevent sending and receiving mail.
      • Run Windows Update and install the latest updates.
    7. If Outlook on the web also is not receiving mail, have a Microsoft 365 admin verify the mailbox and service state.
      • In Microsoft 365 Admin Center, check that the user still has an Exchange Online license assigned and that the mailbox is active.
      • If multiple users are affected, the admin should check Microsoft 365 Service health status under Exchange Online.
    8. Run Microsoft troubleshooting tools.
      • Use the Support and Recovery Assistant for Microsoft 365 for common Outlook connectivity issues.
      • If available, a Microsoft 365 admin can run Outlook User Connectivity diagnostics.
    9. If the problem affects Outlook on the web and Outlook desktop, and the mailbox/license look correct, contact Microsoft support from the Microsoft 365 admin side for backend investigation.
    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Austin-H 8,385 Reputation points Microsoft External Staff Moderator
    2026-09-09T02:41:25.8733333+00:00

    Hello Jeff Wittern

    Sorry to hear this is affecting your business email. The AI response above already covers the most common Outlook and Exchange Online checks. To help narrow this down further, could you clarify the following:

    • Are you able to receive messages in Outlook on the web (OWA), or are messages missing there as well?
    • Can you still send email successfully?
    • When someone sends you a test email, does the sender receive a non-delivery report (NDR/bounce message), or does the message appear to be delivered normally?
    • Is this affecting only your mailbox, or are other users in your Microsoft 365 organization experiencing the same issue?

    These details will help determine whether the issue involves the Outlook application, your mailbox, or your organization’s mail flow.

    If messages are also missing from Outlook on the web, please ask your Microsoft 365 administrator to: 

    Please let me know the results and we can continue troubleshooting from there.

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