Emails not appearing for days

Question

Emails not appearing for days

Christy Angell 0

Emails are not appearing in my outlook inbox for several days after they were sent. How can this be fixed?

Lin v 1,380 Reputation points Independent Advisor

2026-09-02T19:18:11.5433333+00:00

Hi Christy,Have you reviewed the provided answer? Please let me know if there are any updates.
Christy Angell 0 Reputation points

2026-09-02T19:32:19.7533333+00:00

I have reviewed the provided answer, still working on figuring things out.
Lin v 1,380 Reputation points Independent Advisor

2026-09-02T23:07:23.06+00:00

Hi Christy,

Thank you for the update. If you have already reviewed and tried the suggestions provided above and the issue persists, I recommend contacting your IT administrator for further investigation.

They can run a Message Trace to verify when the affected messages were received by Exchange Online and delivered to the mailbox. This can help determine whether the delay is occurring during mail delivery or only within the Outlook client.

They can also review the tenant's Service Health status to determine whether the issue may be related to the ongoing Exchange Online incident.

Based on the latest Service Health update, Microsoft has confirmed that the majority of affected users have been mitigated and is continuing to work toward a full resolution. If you're still experiencing the problem, I would recommend asking your administrator to open a support ticket with Microsoft so the affected mailbox and tenant can be reviewed in more detail.
Christy Angell 0 Reputation points

2026-09-17T16:35:46.2466667+00:00

I think we have resolved the issue, continue to monitor and watch though. Thank you for your assistance.
Lin v 1,380 Reputation points Independent Advisor

2026-09-17T16:55:00.05+00:00

Hi Christy,

Thank you for the update. I'm glad to hear the issue appears to be resolved.

If the information provided in my answer was helpful, please consider marking the answer as accepted. This may help other users experiencing similar behavior find relevant information more quickly.

Thank you for sharing the outcome and for helping keep the thread updated.

Wishing you a great rest of your day.

2 answers

Your answer

Lin v 1,380 Reputation points Independent Advisor

2026-09-02T19:18:11.5433333+00:00

Hi Christy,Have you reviewed the provided answer? Please let me know if there are any updates.
Christy Angell 0 Reputation points

2026-09-02T19:32:19.7533333+00:00

I have reviewed the provided answer, still working on figuring things out.
Lin v 1,380 Reputation points Independent Advisor

2026-09-02T23:07:23.06+00:00

Hi Christy,

Thank you for the update. If you have already reviewed and tried the suggestions provided above and the issue persists, I recommend contacting your IT administrator for further investigation.

They can run a Message Trace to verify when the affected messages were received by Exchange Online and delivered to the mailbox. This can help determine whether the delay is occurring during mail delivery or only within the Outlook client.

They can also review the tenant's Service Health status to determine whether the issue may be related to the ongoing Exchange Online incident.

Based on the latest Service Health update, Microsoft has confirmed that the majority of affected users have been mitigated and is continuing to work toward a full resolution. If you're still experiencing the problem, I would recommend asking your administrator to open a support ticket with Microsoft so the affected mailbox and tenant can be reviewed in more detail.
Christy Angell 0 Reputation points

2026-09-17T16:35:46.2466667+00:00

I think we have resolved the issue, continue to monitor and watch though. Thank you for your assistance.
Lin v 1,380 Reputation points Independent Advisor

2026-09-17T16:55:00.05+00:00

Hi Christy,

Thank you for the update. I'm glad to hear the issue appears to be resolved.

If the information provided in my answer was helpful, please consider marking the answer as accepted. This may help other users experiencing similar behavior find relevant information more quickly.

Thank you for sharing the outcome and for helping keep the thread updated.

Wishing you a great rest of your day.

Answer 1

Hi Christy,

Could you check whether the delayed emails appear in Outlook on the web and the Outlook mobile app as soon as they are received, or if they are delayed there as well? If the messages appear promptly in Outlook on the web and the mobile app, but take several days to appear in Classic Outlook, you may try:

The suggestions provided by the AI answer.
Check whether any Inbox rules are moving messages.
Check whether the affected messages are from specific senders or all senders.
Check whether Focused Inbox is enabled and messages are appearing under the Other tab.

If the delay occurs in Outlook on the web and the mobile app as well, your issue may be related to an ongoing incident EX1464935. The Microsoft product team is currently investigating the issue and working on a resolution.For reference: Service status: EX1464935.

User's image

If this is a work or school account, I suggest contacting your IT administrator and asking them to check incident EX1464935 in the service health dashboard for the latest updates.

I hope everything gets sorted out soon. Let me know if you have any questions.

Lin v 1,380 Reputation points Independent Advisor

2026-09-17T16:32:02.48+00:00

Hi Christy,

Just checking in to see how things are going. As the incident has been resolved, I hope things are working normally now on your end.

Any update would be appreciated.

Answer 2

If the messages appear in Online mode, Outlook Web Access, or Outlook Web App, but do not appear in Cached mode for several days, they can be stuck in Outlook’s incoming item processing pipeline. This is associated with the hidden ItemProcSearch folder.

Try these fixes in order:

Run Outlook with the /cleanips switch.
1. Exit Outlook.
2. Select Start > Run.
3. Run:
```
      Outlook.exe /cleanips
```
This clears issues with the incoming item processing pipeline. For Outlook 2007, this requires at least Office 2007 SP2. Later versions have this functionality built in.
If the issue continues, clear the offline Inbox items and force a resync.
1. Start Outlook.
2. Right-click Inbox > Properties.
3. On the General tab, select Clear Offline Items.
4. Select OK when prompted that data was removed from the Outlook data file (.ost).
5. Select OK to close Inbox Properties.
6. Select Inbox in the Navigation Pane.
7. Press Shift+F9 to force resynchronization of the Inbox.
If Outlook is not automatically downloading mail when it starts, recreate the Send/Receive group. For Outlook 2010 and later:
1. Select File > Options.
2. Select Advanced.
3. In Send and Receive, select Send/Receive.
4. Select the existing group, then select Copy.
5. Enter a new group name and select OK.
6. Select the old group.
7. Clear Include this group in Send/Receive (F9) under both When Outlook is Online and When Outlook is Offline.
8. Select Close.
9. Restart Outlook.

If the issue is only in Cached mode, these steps target the most common Outlook-side causes.

References: