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After one year our MS Exchange 2007 server came up with MSExchngeTransport Event ID 1037 telling me to generate a new certificate. &nbsp;I created a new self signed certificate as it recommended and &nbsp;Get-ExchangeCertificate | fl shows 3 &nbsp;certificates: &nbsp;1 self signed Valid, 1 self signed invalid, and one non-self signed invalid(from the local domain controller). &nbsp;How can I set the valid one to be used and how can I update the one from the domain controller to resolve this issue? &nbsp;I have Administrative access to all of these servers.
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After one year our MS Exchange 2007 server came up with MSExchngeTransport Event ID 1037 telling me to generate a new certificate.  I created a new self signed certificate as it recommended and  Get-ExchangeCertificate | fl shows 3  certificates:  1 self signed Valid, 1 self signed invalid, and one non-self signed invalid(from the local domain controller).  How can I set the valid one to be used and how can I update the one from the domain controller to resolve this issue?  I have Administrative access to all of these servers.

Expired Exchange 2007 certificate

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

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.

Exchange

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). The main motivation for HTTPS is authentication of the visited website and to protect the privacy and integrity of the exchanged data. HTTPS is widely used for protecting page authenticity on all types of websites, securing accounts and keeping user communications, identity and web browsing private.