Add O365 Graph API to block or hold an email from sending out in Exchange Online
Customers want O365 Exchange Online to offer the block or hold function for 3rd party security vendor to keep the email objects from sending out until inspection completes.
O365 Graph API doesn’t offer the API to block or hold an email from sending out in Exchange Online, it exposes the risks to end users to leak confidential data and damage their reputation if improper content sent out.
Brent Ritter commented
This is a very desirable feature.
This would be a great enhancement!
This would be an excellent solution to a very desirable use case.