central email advanced

Hi 

Trying to configure Email settings on Sophos Central Email Advanced ( Support sucks waited an hour on hold then lost phone connection, told by support person on chat that i will have call back and he cannot continue with the Case, Poor service IMO)

anyway i managed to setup the MX Records SPF and created a mail flow connector, but emails are not being delivered to Office 365 portal, i can see them being delivered on the Sophos Central Portal, but they are not coming through on anything else , OWA , Outlook etc 

any help would be much appreciated 

thanks in advance