Microsoft Teams主频道导入消息异常：内容显示为Null

按照Microsoft Teams消息导入的官方步骤，将外部消息导入新团队的频道时，仅主频道出现异常：调用Graph API提交消息返回201成功状态，响应体显示消息内容正常，但后续查询该频道消息时，对应消息的内容为Null，且已被标记为删除。导入至自定义创建的频道时一切正常。

请求详情 #

POST https://graph.microsoft.com/v1.0/teams/61826bbc-4b7d-48f7-a5aa-ba8d82756170/channels/19:4f99689e8f904f65bff4f68b55976d57@thread.tacv2/messages

请求体：

{
  "createdDateTime": "2023-04-14T03:27:43.499Z",
  "importance": "normal",
  "from": {
    "user": {
      "id": "3aa4fc7d-c1b0-4f85-a72c-ca5c9057ef3d",
      "displayName": "CAT",
      "email": "CAT@synologycat.onmicrosoft.com",
      "userIdentityType": "aadUser",
      "tenantId": "dcb0e1d1-6cde-4420-a658-ede52a8bead1"
    }
  },
  "body": {
    "contentType": "html",
    "content": "\u003cdiv\u003e\n\u003cdiv itemprop=\"copy-paste-block\"\u003e\n\n\u003cdiv style=\"font-size:14px\"\u003e一般的文字\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e"
  }
}

响应状态：201
响应体：

{"@odata.context":"https://graph.microsoft.com/v1.0/$metadata#teams('61826bbc-4b7d-48f7-a5aa-ba8d82756170')/channels('19%3A4f99689e8f904f65bff4f68b55976d57%40thread.tacv2')/messages/$entity","id":"1681442863499","replyToId":null,"etag":"0","messageType":"message","createdDateTime":"2023-04-14T03:27:43.499Z","lastModifiedDateTime":"0001-01-01T00:00:00Z","lastEditedDateTime":null,"deletedDateTime":null,"subject":null,"summary":null,"chatId":null,"importance":"normal","locale":"en-us","webUrl":"https://teams.microsoft.com/l/message/19%3A4f99689e8f904f65bff4f68b55976d57%40thread.tacv2/1681442863499?groupId=61826bbc-4b7d-48f7-a5aa-ba8d82756170&tenantId=dcb0e1d1-6cde-4420-a658-ede52a8bead1&createdTime=1681442863499&parentMessageId=1681442863499","policyViolation":null,"eventDetail":null,"from":{"application":null,"device":null,"user":{"@odata.type":"#microsoft.graph.teamworkUserIdentity","id":"3aa4fc7d-c1b0-4f85-a72c-ca5c9057ef3d","displayName":"CAT","userIdentityType":"aadUser"}},"body":{"contentType":"html","content":"<div>\n\n<div itemprop=\"copy-paste-block\">\n\n\n<div style=\"font-size:14px\">一般的文字</div>\n</div>\n</div>"},"channelIdentity":{"teamId":"61826bbc-4b7d-48f7-a5aa-ba8d82756170","channelId":"19:4f99689e8f904f65bff4f68b55976d57@thread.tacv2"},"attachments":[],"mentions":[],"reactions":[]}

查询结果 #

GET https://graph.microsoft.com/v1.0/teams/61826bbc-4b7d-48f7-a5aa-ba8d82756170/channels/19:4f99689e8f904f65bff4f68b55976d57@thread.tacv2/messages

返回的异常消息片段：

{
  "id": "1681442863499",
  "replyToId": null,
  "etag": "1681442863499",
  "messageType": "message",
  "createdDateTime": "2023-04-14T03:27:43.499Z",
  "lastModifiedDateTime": "2023-04-14T03:27:43.499Z",
  "lastEditedDateTime": null,
  "deletedDateTime": "2023-04-14T03:27:43.499Z",
  "subject": null,
  "summary": null,
  "chatId": null,
  "importance": "normal",
  "locale": "en-us",
  "webUrl": "https://teams.microsoft.com/l/message/19%3A4f99689e8f904f65bff4f68b55976d57%40thread.tacv2/1681442863499?groupId=61826bbc-4b7d-48f7-a5aa-ba8d82756170&tenantId=dcb0e1d1-6cde-4420-a658-ede52a8bead1&createdTime=1681442863499&parentMessageId=1681442863499",
  "from": null,
  "policyViolation": null,
  "eventDetail": null,
  "body": {
    "contentType": "text",
    "content": null
  },
  "channelIdentity": {
    "teamId": "61826bbc-4b7d-48f7-a5aa-ba8d82756170",
    "channelId": "19:4f99689e8f904f65bff4f68b55976d57@thread.tacv2"
  },
  "attachments": [],
  "mentions": [],
  "reactions": []
}

• 等待团队初始化完成：新团队创建后，主频道会生成系统欢迎消息，后台需要时间完成配置。建议团队创建后等待5-10分钟，再执行消息导入操作。
• 调整消息时间戳：确保导入消息的createdDateTime晚于团队创建时间，避免与系统消息时间重合，防止时间线校验冲突。
• 启用团队导入模式：在导入消息前，通过Graph API将团队设置为导入模式，执行PATCH /teams/{team-id}，设置{"isArchived": false, "specialization": "none", "template@odata.bind": "https://graph.microsoft.com/v1.0/teamsTemplates('standard')"}，确保系统允许批量导入历史消息。
• 移除HTML特殊属性：请求体中的HTML包含itemprop="copy-paste-block"属性，可能触发Teams内容安全策略。移除该属性后重新提交消息。
• 验证权限配置：确认调用API的应用拥有ChannelMessage.Send和Team.ReadWrite.All应用权限，且操作身份对主频道具备完全访问权限，避免因权限不足导致消息被系统自动清理。
• 排查审核日志：通过Azure AD审核日志或Teams管理中心的消息审核记录，查看消息被删除的具体触发原因（如合规策略拦截、系统后台任务清理）。

内容的提问来源于stack exchange，提问作者Wen Hsiao