Hello, My edge selfsigned certificates expired in few days and I wonder whether a renew self signed certificate always involves resubscribing my Edge Transport Server? What would be the consequence if self-signed or the Edge Transport Server subscribing aren't renewed in time ? [PS] C:\>Get-ExchangeCertificate | fl AccessRules : {System.Security.AccessControl.CryptoKeyAccessRule, System.Security.AccessControl Rule} CertificateDomains : {SERV02, SERV02.COMPANY.COM} HasPrivateKey : True IsSelfSigned : True Issuer : CN=SERV02 NotAfter : 23/04/2012 19:18:27 NotBefore : 23/04/2011 19:18:27 PublicKeySize : 2048 RootCAType : None SerialNumber : 3C955D4FE50C8C4A66B306B0 Services : SMTP Status : Valid Subject : CN=SERV02 Thumbprint : A7B918F8FCCC4A26106ADE48A92C7A Many Thanks, Graig

Renewing self signed certificate always involves resubscribing edge transport server Because old self signed key information are stored on each hub transport server. If you don't renew the self signed certificate in time, There should not be impact to the mail flow. Edge synchronization will fail. Any new recipient information, andy modification or addition such as accepted domains etc...will not be synchronize to Edge transport server due to this your new recipient will not be able to receive external emails. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Hasnain Shaikh| My blogs: http://messagingserversupport.com