Xerox Secure Access vs Office 365 smtp

Hi, when we setup on conneckey an office 365 smtp server with credentials and and office 365 account, sending a test mail from cwis works fine

it also works from the machine

but when setup an accounting like xerox secure access/ equitract or whatever

when we login ,  the default from address is changed to the logid user, thats the expected bevahiour we whant

but when we send the mail, the mail is revoked

it probably has todo with the office 365 acount we setup before, because microsoft probably denies sending with another "from address" 

is that correct? is it possible to setup so the mails are still being allowed b office 365 

probably the same issue with other smtp servers in combination with credentials...

thnx