The default settings in Exchange 2010/SBS 2011 do not advertise these to the user under OWA. If you do enable services such as POP or IMAP the settings are not updated and you need to update these yourselves.
Enable POP3 or IMAP in Exchange 2010/SBS 2008 / 2011 by performing the following :
Check in Outlook all working OK by using the following settings
Once ok , advertise the settings that work in OWA by
Open Exchange Shell , Run these for replacing with your correct domain and pop / imap settings
Set-POPSettings -ExternalConnectionSettings “mail.contoso.com:995:ssl”
Set-IMAPSettings -ExternalConnectionSettings “mail.contoso.com:143:tls”
For SMTP , it uses is the FQDN value on the chosen receive connector. You can find this in the Exchange console via Configuration>Hub Transport>Receive Connectors, Right clicking and choosing Properties on the chosen receive connector.
Once all your settings have been correctly updated, Run this to find your Hubtransport Identity
Get-ReceiveConnector |FL Identity
Then Run this to publish the settings
Set-ReceiveConnector -Identity “**YOUR IDENTITY FROM ABOVE**” -AdvertiseClientSettings:$true
Open Internet Information Services in Administrative Tools
Right click on the server, Stop and Start
You should see the new settings updated