Hi thereOk I have set up a Room Mailbox but I only want a group of people to be able to use this resource to book meetings.So I gave myself full psermissions to this Room Mailbox. Then logged into OWA on my account and from there opened the Room Mailbox.Then what i wanted to do was use a Security group on the option under Resource Scheduling Permissions for These users can schedule automatically if the resource is available: but I cant see any security groups only distrubition groups and user accounts.Can you not use a security group for this or am i doing something wrong?Thanks in advance Luke

Is the security group mail-enabled and set as a universal security group? ( thats the default if created with the 2007 tools)http://technet.microsoft.com/en-us/library/bb123521.aspx How to Create a New Security Group

Hi AndyThanks for that. You got it bang on. The security group was created under AD so was not mail-enabled. I have now done this through Exchange and it works fine. Easy when you know how.Thanks for your helpLuke