As a temporary workaround, if you can't change the configuration on the other server, you can upgrade to ePO 5.10 with TLS 1.0 enabled.

CAUTION: McAfee strongly discourages enabling TLS 1.0 in ePO 5.10, because doing so reduces the security posture of your ePO server. This workaround is intended for temporary use. Use it only as a last resort until you can upgrade other servers in the environment to versions that work with a TLS 1.1 or 1.2 connection.

Start the ePO 5.10 install or upgrade with the DISABLETLSV1=0 switch. The command line is:
 
NOTE: The system property -Djdk.tls.client.protocols=TLSv1,TLSv1.1,TLSv1.2" is appended to the installer and Java Options in the Windows Registry, and enables the following:

• ​TLSv1 ePO SQL Server
• Registered Servers for SQL Server
• MySQL
• PostgreSQL
• LDAP servers

If you have already installed or upgraded to ePO 5.10 and you need to enable TLS 1.0:

CAUTION: McAfee strongly discourages enabling TLS 1.0 in ePO 5.10, because doing so reduces the security posture of your ePO server. This workaround is intended for temporary use, and only as a last resort until you can upgrade other servers in the environment to versions that work with a TLS 1.1 or 1.2 connection.

1. Open the Windows registry.
2. Navigate to: HKLM\SOFTWARE\Wow6432Node\Apache Software Foundation\Procrun 2.0\MCAFEETOMCATSRVXXX\Parameters\Java
3. Edit the REG_MULTI_SZ key named Options.
4. Add the following value in a new line in the Options key:

5. ​Restart the ePO services. 

To reverse the changes, repeat these steps, and remove the line that you added in step 4.