https://community.cisco.com/t5/unified-communications-infrastructure/cisco-expressway-b2b-calls/m-p/2791471#M23360 <P>Yes, you will need to generate a Certificate Signing Request and get valid, signed certificates from a CA (Certificate Authority). This will allow you to setup the traversal zone between the core and edge. You'll need to make sure that once you have the certificates, you upload the root and intermediary certificates, as well as the identity certificate from the CA into the certificate stores of the core and edge server.</P> Wed, 16 Dec 2015 03:14:23 GMT Ryan Huff 2015-12-16T03:14:23Z https://community.cisco.com/t5/unified-communications-infrastructure/cisco-expressway-b2b-calls/m-p/2791470#M23358 <P>Hello Expert !</P> <P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Do i need &nbsp;to generate CSR on expressways while configuring &nbsp;B2B calls ? Please noted i am not using MRA feature.</P> <P></P> <P>KV</P> Tue, 19 Mar 2019 17:29:36 GMT https://community.cisco.com/t5/unified-communications-infrastructure/cisco-expressway-b2b-calls/m-p/2791470#M23358 kingvoice 2019-03-19T17:29:36Z https://community.cisco.com/t5/unified-communications-infrastructure/cisco-expressway-b2b-calls/m-p/2791471#M23360 <P>Yes, you will need to generate a Certificate Signing Request and get valid, signed certificates from a CA (Certificate Authority). This will allow you to setup the traversal zone between the core and edge. You'll need to make sure that once you have the certificates, you upload the root and intermediary certificates, as well as the identity certificate from the CA into the certificate stores of the core and edge server.</P> Wed, 16 Dec 2015 03:14:23 GMT https://community.cisco.com/t5/unified-communications-infrastructure/cisco-expressway-b2b-calls/m-p/2791471#M23360 Ryan Huff 2015-12-16T03:14:23Z