Root CA certificate has expired

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A quick Fix till the root CA is installed

Disable the TLS on the LDAP server as a workaround till the certificates are re-deployed

Execute the below commands on the LDAP servers 

zmlocalconfig -e ldap_starttls_required=false
zmlocalconfig -e ldap_starttls_supported=0
zmcontrol restart

Once the certificates are re-deployed then enable TLS on the LDAP server again. 

zmlocalconfig -e ldap_starttls_required=true
zmlocalconfig -e ldap_starttls_supported=1
zmcontrol restart

Ref:

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