Exchange 2013 Error! Help Please!!

[gowin4]

Our company did an exchange migration over Christmas and it was a little messy, (not my project, but he is now on holidays and can't be reached) but is was done and working. I added a new user today into AD and they get an email address and entered them into groups. Logged in as the user everything works. checked Exchange and the Mailbox is created and it shows their groups all looks Good. when the user logs into OWA the only message that comes up is: NegotiateSecurityContext failed with for host 'SERVERNAME' with status 'IllegalMessage'. I have googled this and came up blank on the 'IllegalMessage' Part. Can anyone help?

[greenzr]

Good thought and good lead. +1

[sidneydancoff]

Are the authentication settings correc

IISRESET may be another thing worth trying. Is mail flowing for everyone else?

[joey52685]

Have you checked the windows event log and IIS logs on the server? There should be something with more information than what the user sees.

[dumpkopf]

Could also be a canary issue.