SymptomsThere is a custom made application template installed on some container (CT).
The question is if it is possible to create application template of update or newer version of this application and install over existing template?
AnswerActually application template is set of files, registry settings and created services. Application wizard simply records all actions made inside container during template creation. So if application update or newer application version is is installed using template creation wizard and corresponding template is created it could contain the same services, registry keys and files which are used in original template.
When such template is tried to be installed to container which has original application template, file, registry keys or services could conflict with already installed ones.
So to create application update template please use the following algorithm:
1. Start template creation wizard and do steps from 1 to 5.
2. Do not MINIMIZE RDP as it is described in step 6, but start with installation of original template. At this point the recorder is not started yet, so we just prepare VE with original template for update installation.
3. Once original template is installed please continue application update installation starting from step 6.
Note: The article outlines the general approach to create application template updates, testing and template tuning might be required for a particular application.