I have a client who is dealing some business with a bank and bank asked them that they need to have TLS enabled on their exchange server for them to send email to us and vice versa.
We are using Cisco Ironport smart host and exchange 2013 environment.
We have MX records as below
mail1.contoso.in
mail2.contoso.in
We have third party Cerificate as below
Mail.contoso.in
pop.contos.in
autodiscover.contoso.in
Please advise us we need to change certificate any and how to enable the TLS.
Thanks & Regards, Kumar N