You don't have permission to sent to

[Grace Yin]

Hi, 

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!

[#2]

Are the mailboxes on-premises, in Office 365 or is it a hybrid with one on-premises and the other in Office 365?

[#3 · Accepted solution]

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

[#4]

@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!!

[#5]

@Vasil Michev 

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

Thank you for your prompt reply