Getting 2400 error in outlook application

Try this solution by Frank..

1. Open Word, click File> Account> Sign outunder User information.
2. Clear the Windows credentials: go to Control Panel> Credential Manager> Remove the Windows Credentials(e.g. MicrosoftOffice15_Data:xxxor MicrosoftOffice16_Data:xxx).
3. Navigate to and delete the following key and all of its subkeys from the Registry.

 HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Identity

WARNING*: Modifying Registry incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry can be solved. Modify Registry at your own risk.*

Same 2400 error when running Outlook. Began yesterday after installing updates and rebooting, An office update shows in control panel / programs. Account is an @outlook.com, retail office 2016. Been trying everything I've found online short of uninstalling, nothing working.

i have found my own solution from the below link. It is solved my problem with code 2400 error s well.

https://answers.microsoft.com/en-us/msoffice/forum/all/sign-in-type-the-email-of-the-account-you-would/63532fb6-4bc9-46d5-8a79-2a3505e6e202?page=2

Hi,

I am receiving the same error code while trying to open outlook.

But the difference is, i am using outlook app on my laptop (not web) and if i click to my company mail inbox, outlook is working normal (still hotmail not works).

If i try to connect with hotmail account on web outlook, i can connect. (i can receive hotmail mails from mobile app).

I am using my personal laptop for business and IT stated that they can not support.

Below are some screenshot's for my issue.

I cannot access my Outlook e-mails, can someone help me?

Thank You.

Craig