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title: Technical details (Welcome)
description: Technical details for the Welcome app by Accelerator 365
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# Technical details (Welcome)
## Technical details for the Welcome app by Accelerator 365
### Jump to
- [**Required API permissions**](https://support.accelerator365.com/en/welcome-technical-details?hsLang=en#required-api-permissions)
- [**Data storage**](https://support.accelerator365.com/en/welcome-technical-details?hsLang=en#data-storage)
- [**Recommended deployment scope**](https://support.accelerator365.com/en/welcome-technical-details?hsLang=en#recommended-deployment-scope)
---
### Required API permissions
The following Microsoft Graph API permissions are required by this app.
Some permissions may already be pre-approved by Microsoft, while others require manual approval by a user with the **Global Administrator role** after the app has been deployed. See our [guide to approving API permissions](https://support.accelerator365.com/en/approving-api-permissions?hsLang=en) for full instructions.
| **Scope** | **Purpose** | **Pre-approved by Microsoft** |
| --- | --- | --- |
| User.ReadBasic.All | Read all user profile details for attributes used in the greeting message. | ✅ Yes |
| Files.ReadWrite.All | Allows video slides to seamlessly play videos stored in Microsoft 365 libraries by securely accessing and preparing the file for playback. | ✅ Yes |
| Sites.Read.All | Allows video slides to seamlessly play videos stored in personal libraries, such as OneDrive, by securely accessing and preparing the file for playback. | ✅ Yes |
These permissions are **delegated**, apply **organization-wide**, and are essential for the app to function properly.
### Data storage
The Welcome app stores data in a couple of locations within SharePoint, including the web part itself and in background SharePoint lists and libraries.
**Web part**
The Welcome app stores data such as manually created slide content directly within the web part configuration.
If the optional local weather feature is enabled, the app will require an API key from [OpenWeather](https://openweathermap.org/price). This key must be entered in the web part’s property pane and is stored with the individual web part configuration.
**Note:** the free OpenWeather plan allows up to 1,000,000 API calls per month. If your organisation exceeds this limit, you may need to upgrade to a paid OpenWeather plan at your own cost.
**SharePoint lists and libraries**
The Welcome app provisions specific SharePoint lists and libraries during the initial data source creation setup to support its features and functionality. These include:
| **List/library title** | **Relative URL** | **Purpose** |
| --- | --- | --- |
| Welcome Web Part Weather | /Lists/WMW\_WMReplyWelcomeWebPartWeather | A cache of the last updated weather information per location. |
| Welcome Web Part Errors | /Lists/WMW\_WMReplyWelcomeWebPartErrors | Errors logged by Welcome when failing to obtain weather information. |
| Welcome Web Part - Custom Layouts | /WMW\_WMReplyWelcomeWebPartLayouts | Storage of the custom layouts. |
### Recommended deployment scope
It is expected that the Welcome app is made available only on specific areas of your SharePoint tenant as necessary, e.g., a home site or landing site.
Therefore, it is recommended to select the **Only enable this app **option on deployment (see the [Installation instructions](https://support.accelerator365.com/en/getting-started/installation-instructions?hsLang=en#approve-the-app) page). This means the app is available for Site Owners to manually add to their site.
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