As TLS 1.0 is disabled, BW should use TLS 1.1 or higher for connecting to Salesforce. Follow the steps below to enable support TLS 1.1 or higher.
1)Apply the latest hotfix for BW and the compatible TRA. As of July'16 here are the latest BW/TRA hotfix versions:
BW 5.13 hotfix-04 and TRA 5.10 hotfix-02
BW 5.12 hotfix-11 and TRA 5.9.0 hotfix-08 or TRA 5.9.1 hotfix-04
BW 5.11 hotfix-22 and TRA 5.8.0 hotfix-12
Please check if there are subsequent hotfixes and always try to apply the latest hotfix.
2). TLS 1.2 is not supported with Entrust so the security provider must be
set to "j2se" or "ibm" (for IBM JRE's only). This can be done by
adding the following property to the deployed BW application .tra: java.property.TIBCO_SECURITY_VENDOR=j2se
3). Add "TRA_HOME%/hotfix/lib/TIBCrypt.jar;" to the beginning of
tibco.env.CUSTOM_CP_EXT in designer.tra / deployed application .TRA .