Bad gateway error when installing teams custom app to team in migration mode

Question

Hi All,

I am currently writing a migration solution to import content from an external messaging platform into Microsoft Teams. As part of this I am required to use a custom teams app with RSC permissions to handle part of the migration of content.

However I have found that when I go to install my app through the Graph API (I need to do it this way as the team is hidden in the UI while in migration mode) I get a 502 bad gateway error (See my request below).

https://graph.microsoft.com/v1.0/teams/38f635f9-7233-4830-be27-3738ea170210/installedApps

{
    "teamsApp@odata.bind": "https://graph.microsoft.com/v1.0/appCatalogs/teamsApps/53d4eb15-0193-4d6d-8665-9596a3f34fcd",
    "consentedPermissionSet": {
        "resourceSpecificPermissions": [
            {
                "permissionValue": "Channel.Create.Group",
                "permissionType": "application"
            },
            {
                "permissionValue": "ChannelSettings.ReadWrite.Group",
                "permissionType": "application"
            }
        ]
    }
}

However I found out that when I take the team out of migration mode and re-send the request I get a conflict error. This lead me to test the same install request in the non migration mode team which produces the correct 201 created response.

After learning this I started my tests again in migration mode which showed that the app is installed despite the 502 error, I confirmed this using this endpoint.

https://graph.microsoft.com/v1.0/teams/02bd9fd6-8f93-4758-87c3-1fb73740a315/installedApps?$expand=teamsAppDefinition

By continuing my tests I was able to also validate that I could migrate the messages despite the 502 Bad Gateway error.

Therefore my question would be is this expected behaviour or is this a bug? I have attached the Azure permissions and my app manifest in the hopes that others can replicate and confirm.

Entra permissions.png

{
  "$schema": "https://developer.microsoft.com/en-us/json-schemas/teams/v1.16/MicrosoftTeams.schema.json",
  "version": "1.0.3",
  "manifestVersion": "1.16",
  "id": "02bb48e8-541a-416a-8f30-d95a4f9b8850",
  "packageName": "com.package.name",
  "name": {
    "short": "Cameron App",
    "full": "Camerons RSC App"
  },
  "developer": {
    "name": "Redacted",
    "mpnId": "",
    "websiteUrl": "Redacted",
    "privacyUrl": "Redacted",
    "termsOfUseUrl": "Redacted"
  },
  "description": {
    "short": "A sample app to test the RSC Permissions",
    "full": "This app will test the RSC Permissions Associated with a teams"
  },
  "icons": {
    "outline": "outline.png",
    "color": "color.png"
  },
  "accentColor": "#FFFFFF",
  "bots": [
    {
      "botId": "1d94d4d2-9ea1-45c9-aaa0-4eab461189ff",
      "scopes": [
        "team"
      ],
      "isNotificationOnly": false,
      "supportsCalling": false,
      "supportsVideo": false,
      "supportsFiles": false
    }
  ],
  "validDomains": [],
  "webApplicationInfo": {
    "id": "15dfdb81-2552-4c82-95ac-9bef344e7646",
    "resource": ""
  },
  "defaultGroupCapability": {
    "team": "bot",
    "groupchat": "bot",
    "meetings": "bot"
  },
  "authorization": {
    "permissions": {
      "resourceSpecific": [
        {
          "name": "Channel.Create.Group",
          "type": "Application"
        },
        {
          "name": "ChannelSettings.ReadWrite.Group",
          "type": "Application"
        }
      ]
    }
  },
  "supportedChannelTypes": [
    "sharedChannels",
    "privateChannels"
  ]
}