Click the Office 365 account, and then click Change. Exit, and then restart Outlook.
Re: Outlook not updating inbox The root of the problem may be that the second account has a large number of folders > 500 will cause a problem with the OST file, it cannot handle more then 500 folders (in all accounts in this current profile) and this is why turning off cached mode may help. Removing this 2nd account may also correct this issue.
So, why Outlook 2016 does not update automatically when downloading emails?
It does not update automatically when send / receive operation is performed to download emails from the server. This behavior of Outlook 2016 (or other Outlook versions too) occurs because of a damaged Send / Receive group within Outlook. To resolve this problem, you need to create a new send / receive group in MS Outlook.
How to fix Microsoft Outlook not responding?
Go to file and select “Account Setting” and click on Change Account Tab. Check the “ Test Account Settings ”, followed by clicking the Next button. Now Outlook will test the account settings, and provide a message when everything is fine. Once you get this message, click Close.
After the process gets completed, use the following troubleshooting methods to verify if the email is still not syncing. Go to file and select “Account Setting” and click on Change Account Tab. Check the “Test Account Settings”, followed by clicking the Next button.
You should be thinking “How to fix outlook not responding to emails?”
1: check junk folder or other folders for messages. 2: check rules. 3: create a new Outlook profile to see if this issue still exists. For instruction please see Create a new Outlook profile. 4: launch Outlook in safe mode, for your reference: Open Outlook in safe mode.
There could be all kinds of reasons for not receiving emails in Outlook, please try the below methods: 1: check junk folder or other folders for messages. 2: check rules. 3: create a new Outlook profile to see if this issue still exists. For instruction please see Create a new Outlook profile.