App Studio自动转换旧版本应用清单为Schema 1.9导致Teams安装失败及相关问题问询

Alright, let's break down these two related Teams app manifest issues and walk through actionable fixes for each:

Fix for v1.5 Manifest Auto-Upgraded to v1.9 Causing Installation Failure #

The automatic schema upgrade in App Studio is indeed the likely culprit here—v1.9 introduces new mandatory fields and stricter validation rules that your original v1.5 app isn't set up to handle. Try these steps:

• Revert the schema version manually: After uploading your v1.5 manifest to App Studio, immediately open the Schema Editor and change the $schema field back to:

  "https://developer.microsoft.com/en-us/json-schemas/teams/v1.5/MicrosoftTeams.schema.json"
  

  Then scan through the manifest and delete any v1.9-specific fields (like webApplicationInfo or devicePermissions) that were automatically added—these aren't required for v1.5 and will cause validation errors.
• Skip App Studio entirely for sideloading: If App Studio keeps forcing the schema upgrade, you can sideload your original v1.5 manifest directly in the Teams client:
  1. Open Teams > Go to Apps > Click Manage apps
  2. Select Upload an app > Choose Upload a custom app
  3. Select your original v1.5 manifest file (ensure it's a valid JSON with no syntax errors)
• Validate the v1.5 manifest locally: Use a JSON schema validator to confirm your manifest strictly adheres to v1.5 rules before sideloading—this catches typos or missing fields that might slip past initial checks.

Fix for App Studio-Generated v1.9 Manifest Failing Validation #

If the v1.9 manifest created directly in App Studio won't pass validation, the issue is almost always a missing mandatory field or misconfigured setting. Try these troubleshooting steps:

• Check for mandatory fields: v1.9 requires fields like webApplicationInfo.id (if using SSO) and properly formatted resourceSpecific permissions if your app uses Teams-specific resources. App Studio might generate empty placeholders for these fields—fill them in with valid values (e.g., your Azure AD app ID for webApplicationInfo.id).
• Fix syntax and type errors: Common issues include trailing commas, mismatched quotes, or using strings instead of numbers for fields like version. Use a JSON linter to scan the manifest for these small but critical errors.
• Verify permission configurations: If your app declares permissions, ensure the authorization.permissions.resourceSpecific array uses valid permission values (e.g., ChannelMessage.Read.All instead of a typo like ChannelMessage.Read).
• Clear App Studio cache: Sometimes cached data in App Studio causes corrupt manifest generation. Open App Studio in an incognito browser window, log back in, and regenerate the manifest from scratch.

内容的提问来源于stack exchange，提问作者Hilton Giesenow