Solution

1. Depending on the security policy set, verify the following service attributes in the Security group:
   • If the Presence Security policy is Secure Mode:
     1. Ensure that the SIP Entity links are using TLS.
     2. Ensure that the XMPP Client to Server Secure Communication (TLS) Mode field is set as Required.
     3. Ensure that the XMPP Federation <x> Enable Secure Communication (TLS) <X> field is set as True.
   • If the Presence Security policy is No Security:
     1. Ensure that the SIP Entity links are using TCP.
     2. Ensure that the XMPP Client to Server Secure Communication (TLS) Mode field is set as Disabled.
     3. Ensure that the XMPP Federation <x> Enable Secure Communication (TLS) <X> field is set as False.
   • If the Presence Security policy is Best Effort Security, any transport type is accepted.