Outlook Anywhere for autodiscover cert error

Hi There,

I'd implemented outlook anywhere(Exchange 2010) for users with 3rd Party SSL certificate(single cert, no wild card) ,for example, mail.123.com .

Mail flow is working fine, but when open outlook 2010, it will prompt out certificate error about autodiscover.123.com, 

i understand there, to get rid of this error message, users have to buy wild card certificate instead of single, is there any way to get rid this warning

without purchase a new cert again? 

Thanks

Alfred

Alfred