outlook无法撤回误发邮件

Hello Tu Yuyang,

Good day. Thank you for posting in the community!

Sincere apologies for any inconvenience this issue might be causing you. Unfortunately, recalling a sent email is not always guaranteed to work, especially if the email has already been opened or if the recipient is using a different email service. If possible, reach out through another method (like a phone call or messaging app) to inform your professors about the situation, asking them to ignore the email during the holiday period. As you've mentioned that you've already marked the email as phishing, this could potentially flag the email, but it may not stop them from seeing it.

Your current scenario must be diagnosed by the Microsoft Technical Support Team. Microsoft's back-end support team should check the advanced logs. A front-line technical support engineer can also have a specific support team investigate some specific situations further. 

Due to the limited permissions and access resources of our forum moderators, we are unable to collect certain types of log information in public forums. For this reason and for the privacy of our users' data, our technical support team can provide possible information from their point of view after diagnosing the situation. 

For the standard procedure information provided above, in your organization, Office 365 Global Admins may need to contact the Office 365 support team on the backend through an open service request so that they can diagnose this particular scenario with some more technical resources,  

For this standard procedure, the following is the official documentation that Global Admins refer to: **** 获取支持 - Microsoft 365 admin | Microsoft Learn (Online option).  

You can also call MS support via - **** 全球客户服务电话号码 - Microsoft 支持

Note: If you are an end-user person, you may need to contact the Office 365 Global Administrator in your business organization to contact a Technical Support Engineer for further processing. 

Important: If any of your organization's Office 365 Business/Business/Education subscriptions are from a federated partner or reseller and the global admin can't open a service request on their end, they may need to contact the reseller's support provider so they can help the global admin open the service request on their end. After that, the Office 365 support team will participate in the service request that was created. 

Thank you very much for your valuable time and your cooperation.

Sincerely,

Md Ashabul Haque | Microsoft Community Moderator