Coveo for sitecore license vs CES license
We already have CES license with sitecore and some other connectors are enabled in CES. Sitecore older version applications are using these connectors. If we apply coveo for sitecore license for new application, will it overwrite the existing license or will it merge both?
If the license you are about to apply is a Free license, then no, it will not. If you apply a paid license, then yes it will.
Usually, a paid Coveo for Sitecore license delivered by Coveo should include the content you had with your standard license. If it is not the case, please contact your Coveo vendor.
If you are not sure, you can always backup the actual license file located in
\Program Files\Coveo Enterprise Search 7\Instance