QUESTION: I have a POTX template where I have added some extra guidelines as design support for my colleagues. When I make an export the guidelines do not follow?
This seems to be an issue of the PPTX/POTX format. When exporting only PPTX slides and applying the POTX template the guidelines disappear.
SOLUTION: Involving the PPT format makes the guidelines stay. This means you can add a PPT slide to the slidebasket/virtual presentation and then export to PPTX or PPT and the guidelines will follow. Exporting to PPT format from the POTX template will also make the guidelines to follow, regardless of mix of formats in the slide set to export.
(you can turn on the guide lines feature by right clicking anywhere on the slide in PowerPoint and choose "Grid and Guides...")