No longer fetching emails

[mico]

OTRS was fetching emails just fine for about a month then all of a sudden it stopped. I have been on OWA and the password and user name are working correctly. I have also used telenet to make sure I can check the exchange server .
This is the error I am getting when OTRS is trying to fetch emails.

Backend ERROR: OTRS-CGI-10 Perl: 5.14.2 OS: linux Time: Fri Jul 12 11:05:58 2013 Message: POP3S: Auth for user domain\user/mail.domain.com failed! Traceback (9201): Module: Kernel::System::MailAccount::POP3S::_Fetch (v1.13) Line: 154 Module: Kernel::System::MailAccount::POP3S::Fetch (v1.13) Line: 106 Module: Kernel::System::MailAccount::MailAccountFetch (v1.17) Line: 424 Module: Kernel::Modules::AdminMailAccount::Run (v1.28) Line: 69 Module: Kernel::System::Web::InterfaceAgent::Run (v1.64) Line: 868 Module: ModPerl::ROOT::ModPerl::Registry::usr_share_otrs_bin_cgi_2dbin_index_2epl::handler (unknown version) Line: 46 Module: (eval) (v1.90) Line: 204 Module: ModPerl::RegistryCooker::run (v1.90) Line: 204 Module: ModPerl::RegistryCooker::default_handler (v1.90) Line: 170 Module: ModPerl::Registry::handler (v1.99) Line: 31

[crythias]

POP3S: Auth for user domain\user/mail.domain.com failed!

It means what it says. The server holding the email is asserting that authorization has failed for POP3S access.