Welcome to the #dominoforever Product Ideas Forum! The place where you can submit product ideas and enhancement request. We encourage you to participate by voting on, commenting on, and creating new ideas. All new ideas will be evaluated by HCL Product Management & Engineering teams, and the next steps will be communicated. While not all submitted ideas will be executed upon, community feedback will play a key role in influencing which ideas are and when they will be implemented.
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Support for Subject Alternate Names (SAN) was introduced in Domino 11.0.1
https://help.hcltechsw.com/domino/11.0.1/admin/wn_san_in_x509.html
Also Server Name Indiciation (SNI) was introduced in 11.0.1 as well:
https://help.hcltechsw.com/domino/11.0.1/admin/wn_domino_sni.html
So the same key ring file can be used for multiple certiifcates. You can now host multiple SSL certificates on the same IP address