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Yes, you need to renew the self signed certificate in hub server. because starttls is use for internal and external mail flow also that means you can assign the certificate to SMTP. and you may get the 12014 event id. so could you please follow the below article.<br />
<a href="http://msexchangeguru.com/2011/06/22/event12014/" rel="ugc">http://msexchangeguru.com/<wbr />2011/06/22<wbr />/event1201<wbr />4/</a><br />
<br />
<br />
Thanks
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Yes, you need to renew the self signed certificate in hub server. because starttls is use for internal and external mail flow also that means you can assign the certificate to SMTP. and you may get the 12014 event id. so could you please follow the below article.
http://msexchangeguru.com/2011/06/22/event12014/ [http://msexchangeguru.com/2011/06/22/event12014/]


Thanks

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Hello All,<br />
<br />
My Exchange certificate will soon expire.<br />
<br />
We are currently running a Hybrid configuration between Exchange 2007 (On-Premises) and Office 365. Most of our users have been already migrated. Our Outlook email clients are pointing into the Office 365 servers but our MX record is still pointing to our on premises Exchange 2007 box (MX record will be change to point into the Office 365 servers in the next few weeks).<br />
<br />
Since, I will say, all my SMTP traffic is handled by the Office 365 servers, do I need to renew the certificate on my on-premises Exchange 2007 server?<br />
<br />
If yes why?
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Hello All,

My Exchange certificate will soon expire.

We are currently running a Hybrid configuration between Exchange 2007 (On-Premises) and Office 365. Most of our users have been already migrated. Our Outlook email clients are pointing into the Office 365 servers but our MX record is still pointing to our on premises Exchange 2007 box (MX record will be change to point into the Office 365 servers in the next few weeks).

Since, I will say, all my SMTP traffic is handled by the Office 365 servers, do I need to renew the certificate on my on-premises Exchange 2007 server?

If yes why?

STARTTLS certificate about to expire, do I need to renew in my scenario?

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.