You don't have permission to sent to

Frequent Contributor



When we book a room, the message "You don't have permission to sent to " is showing, and we got the undeliverable bounce back message if sending it.



How to solve this issue? Need help!


Thanks in advance!

4 Replies
Are the mailboxes on-premises, in Office 365 or is it a hybrid with one on-premises and the other in Office 365?
best response confirmed by Grace Yin (Frequent Contributor)

This is basically the "delivery restrictions" feature you can configure for any type of mailbox. Someone configured a list of people that are not allowed to send messages, or similarly, a list of people that are allowed and everyone else is blocked. You can confirm this via:


Get-Mailbox roomname | fl accept*,reject*,RequireSenderAuthenticationEnabled

@Vasil Michev 


Hi Vasil,


Thank you for your help! Yes, it is configured to only allow a group of users to book the room.


Thank you for your help!!

@Vasil Michev 

Hello, how do you do that: Get-Mailbox roomname | fl accept*,reject*,RequireSenderAuthenticationEnabled


Thank you for your prompt reply