Hi Deb,
If you want to change the room mailbox properties, please refer to the following steps:
1. In the EAC, navigate to Recipients> Resources.
2. In the list of resource mailboxes, click the room mailbox that you want to change the properties for, and then click Edit
Moreover, I noticed that you had submitted a service request (SR) about the issue to our support team. Would you please provide your SR number for me, and then I will be able to help you check the latest update on this issue? To request the SR number, I have sent a private message to you.
To access the private message, please refer to the following steps:
1. Go to the Your details section on the right side of the community site.
2. Click Private messages.
3. Click the subject title of the response to read the message.
4. You can reply by using the form on this display.
5. Click Submit Reply.
Thanks,
Jason Jiang