Mail fetch - not working after exchange 2013 upgradejoe

Mail fetch - not working after exchange 2013 upgradejoe

I've migrated to exchange 2013 and with the exception of mail fetch, everything works.  I've verify my access to exchange on port 110,  pop3 services are started, but helpdesk refuses to fetch emails.

Any chance someone could shed some light?   greatly appreciated.

Jo

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