After the Exchange user changes the password, the phone user can still receive the message using the old password

Recently, two colleagues said their user password change password, the phone unexpectedly does not prompt the new password can still receive mail, just began to feel strange, and did not care, the search under the Internet, found that the same people on the Internet encountered the problem, checked the next KB, and really found a, specifically, is a mechanism in IIS, The user's credentials are cached through Basic authentication for a period of 15 minutes (not affected by Outlook MAPI or Windows Integrated authentication).

http://support.microsoft.com/kb/267568

After the Exchange user changes the password, the phone user can still receive the message using the old password