For some deployment methods, you will need the manifest files of our officeatwork Add-ins. For that, install the add-ins you want to use using the built-in Office store experience. Once added, you can search for the following IDs as part of the name of a file (on the drive containing your Office installation) to find the manifest file of the individual add-ins:Template Chooser for Office ID: 22ff87a5-132f-4d52-9e97-94d888e4dd91Content Chooser for Office ID: ea375709-5511-4a7d-9ad9-0150d03e7fbeUploader for Office ID: 5DFDB5CC-192B-4C89-86DE-643F8DD60D3AVerifier for Office ID: d1665a02-d428-4684-bb6b-b1f28a854ca3Designer for Office ID: 444c804e-8891-41f9-b246-f6dac759fca9Wizard for Office ID: e765dd0b-6697-44aa-9025-1ce65686c598The file you are looking for will have a version number amended to - something like this : 22ff87a5-132f-4d52-9e97-94d888e4dd91_3.0.0.0If you cannot find any files that match the above (Manifest IDs) IDs, then try searching using these IDs (AppSource IDs)Template Chooser for Office ID: wa104380050Content Chooser for Office ID: wa104380602 Uploader for Office ID: wa104381430 Verifier for Office ID: wa200000133 Designer for Office ID: wa104380518 Wizard for Office ID: wa104380519 The file should be located in a folder named Manifests in a subdirectory of your WEF folder (%localappdata%\\microsoft\\office\\16.0\\WEF)For better identification, you should rename the files before using them and give them the file extension '.xml'.SharePoint Catalog Deployment method: You should also remove the VersionOverrides element in the manifest file as you will most likely get a permanent error message at the top of the Add-In pane due to an incompatibility of the SharePoint Add-In catalog with this manifest element. The 'only' features you will lose this way are the add-in specific buttons in the ribbon that would allow your user simpler and more intuitive access to the Add-ins and the ability to perform automated Single-Sign-On. You can try and compensate for some of this by embedding the officeatwork Add-ins in your 'Normal.dotm', as well as in your template files. Learn more about this here.Attention: The manifest files might change anytime. We can not guaranty that old manifest files will work for all upcoming updates. Please make sure you update the manifest files frequently and aim to move away from this deployment method as soon as possible.