Check your spam, junk and/or other possible inboxes/folders. Search for the emails that you may be missing with the search option to see if they are ending up in a different folder. Remove and re-add the email account on the Outlook app. Check for any pending updates for your device . . . Read more

To resolve this behavior, create a new Send/Receive group in Outlook: Select File, and then select Options. Select the Advanced tab. … Under both When Outlook is Online and When Outlook is Offline, clear the check box for Include this group in Send/Receive (F9).

Click File > Options. In the Options window, click Advanced, scroll down, and click the Send/Receive button. Under the Setting for group All Accounts section, select the Include this group in send/receive (F9) check box and select the Schedule an automatic send/receive every "XX" minutes check box.

In Outlook 2016, go to File -> Options -> Advanced -> Send/Receive. – Schedule an automatic send/receive every X minutes (where X is the time in minutes).

One of the possible reasons why this issue occurs is due to an outdated or corrupted application. This can also be due to a server related issue. To troubleshoot your Mail app issue, we recommend that you follow these steps: Check if the date and time settings on your device . . . Read more

Restart your device. It may just be the case that your emails have gotten stuck and a restart can usually help reset things and get it working again. … Next check that all of the settings for your account are correct as sometimes your device can run an update and . . . Read more

The Outlook isn’t showing all emails issue may arise because of the default View settings. For instance, filters, sorting settings, etc. may be hiding certain emails in the default View. You can reset the View settings to solve the problem.

After, one may need to sign in Microsoft website and proceed according to the instruction provided there to reinstall Outlook 2016 after it has been uninstalled. All in all, to troubleshoot Outlook, one may reinstall Outlook 365 or any other version that is used.

Like other Office software, you are very likely to meet "Microsoft Outlook has stopped working" error while opening or sending an email with Outlook 2007, 2010, 2013, or 2016. Outlook stopped working may occur due to several reasons, like incompatible add-ins, DLL files problem, lost or corrupted PST file, and . . . Read more

Fortunately, you can take several steps to correct the problem. Right-click the Outlook icon on the taskbar at the bottom of your screen. … Press the "Ctrl," "Alt" and "Delete" buttons on your keyboard simultaneously. … Click "Start," then choose to restart or shut down your computer.