A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Hi Vincent,
It is not feasible to receive email when others share the site with interior users.
If you share with exterior users, you can check it follow the steps:
- Click Settings>select site settings.
- Select Access requests and invitations.
- You can check it as below:
You also can check who share the site with users by audit log.
Please refer to the following article:
Search the audit log in the Office 365 Security & Compliance Center
Given the situation, we suggest you vote for your requirement to UserVoice, which will help better our products and services.
Thanks for your understanding.
Qing