Auto accept procedure

You can follow this as found here: http://msexchangeteam.com/archive/2007/05/14/438944.aspx



Enable Auto-Acceptance for a Resource and Configuring Resource Mailbox Settings

You can automatically process meeting requests and cancellations via OWA or using Exchange Management Shell.

Using Exchange Management Console:

[PS] C:\>Set-MailboxCalendarSettings Resource1 -AutomateProcessing:Autoaccept

[PS] C:\>Get-MailboxCalendarSettings Resource1 |fl

AutomateProcessing: AutoAccept

Using OWA Options Page:

Log into the resource mailbox through OWA and using the Options page, you can configure a resource account to automatically process meeting requests and cancellations. What account do you use to log into OWA? Since the account for a resource mailbox is disabled, you can use either of the two methods to log into the resource mailbox using OWA:

1. Explicit OWA logon with credentials for an account that has FullAccess permissions to the Resource Mailbox. How do I give an account FullAccess permissions to the Resource Mailbox is my next question. In the Exchange Management Shell, run the following command to give FullAccess permissions to a user User1 for the Conference Room1 Resource Mailbox.

[PS] C:\>Add-MailboxPermission -Identity:Resource1 -AccessRights:fullaccess -User:user1

After User1 has been given FullAccess rights, in your browser, enter an explicit URL for the resource mailbox:

http://servername/owa/Resource1@domain.com. When prompted for credentials, enter the username and password for an account that has FullAccess permissions to the resource mailbox  In this case user1.

OR

2. Log into OWA using an account that has has FullAccess permissions to the resource mailbox and use the Open Other Mailbox feature.

Enter the normal URL for OWA:

http://servername/owa

When prompted for credentials, enter the username and password for an account that has FullAccess permissions to the resource mailbox.

In the upper right corner of the OWA page, click the dropdown next to the logged on username and then enter the name of the resource mailbox in the Open Other Mailbox feature

 

When you log into a resource mailbox, click on Options and notice "Resource Settings" on the left pane as an available option just for Resource Mailboxes. You can set "Resource Scheduling Options", "Resource Scheduling Permissions", "Resource Privacy Options" and "Response Message" via this page. Every single option via the shell is available here in a GUI format.