In AEM 6.5.5 uuid index exists OOTB: You should be able to run your search without any additional index tunning 

Avoiding Outages in AEM: Indexing & Caching: https://helpx.adobe.com/customer-care-office-hours/aem/AEM-Outages-Indexing-Caching.html

"AEM to v6.5.5 the legacy API is completely deprecated" - it's not true. In SP5 you still can leverage "User Credentials" to connect to Target

Exporting XF to a target does not require a Targeting mode.1. Make sure that you have the latest SP for AEM 6.5: https://docs.adobe.com/content/help/en/experience-manager-65/release-notes/service-pack/sp-release-notes.html2. To export XF to a Target, you need to configure Target Cloud service. Unles...

It's a known issue, you need to use the latest SP5:https://docs.adobe.com/content/help/en/experience-manager-65/release-notes/service-pack/sp-release-notes.html 

You can possibly use a querry similar to: path=/content/damtype=dam:Assetgroup.1_daterange.property=jcr:content/metadata/@prism:expirationDategroup.1_daterange.upperBound=2020-07-14T23:59:59.000-04:00group.1_daterange.lowerBound=2020-07-13T00:00:00.000-04:00group.p.limit=-1

Despite the SAML configuration you still can log as a local user to CRXDe. For that you can possibly use someting like:curl -sv -X POST -u "admin:*******" -b <COOKIE FILE> --data "j_username=admin" --data "j_password=********" --data "j_workspace=crx.default" --data "j_validate=true" --data "_charse...

How did you configure a replication agent? Do you use an admin as a  user on a Transportation Tab of a replication agent configuration?If it's not an admin, make sure that the user has sufficient ACL for that page location on publish.Do you have any non cq:Page or dam:Asset type of nodes within the ...

I think it means that you should not overlay wcm clientlibs, which might cause some unexpected effect on OOTB UI, but specify cq.common.wcm within your custom libs as dependencies.

Your current execution includes a path D:/AEM-Jar/author/aem-author-4502.jarCan you switch to D:/AEM-Jar/author/ and run the execution command from that path?