how to deside the problem of errors 0x800ccc92 and0x800ccc90 in outlook?

Answer 1

This is a server side error, and isn't your fault.
http://www.outlook-it.com/-error-0x800CCC90-9885681.html

http://support.microsoft.com/default.aspx?scid=kb;en-us;309216

If you can contact IT, they will need to visit those links and update accordingly.

Answer 2

Check your settings, and delete your account. You'll have to replace the POP3 and SMTP servers when add yourself back in again. Unfortunately Outlook tosses a hissy fit every now and then and you have to delete and reinstall your account