We have multiple Room Mailboxes in an Exchange 2010 environment. They were migrated recently from Exchange 2003, converted to room mailboxes and the Resource Booking Attendant enabled. Clients use Outlook 2003. We are looking to configure these mailboxes to accept meeting requests scheduled forever into the future, and reading the following details from the Technet library I configured as such: BookingWindowInDays: The BookingWindowInDays parameter specifies the maximum number of days in advance that the resource can be reserved. Valid input is an integer from 0 through 1080. When the value is set to 0, the resource can be reserved at any date in the future. EnforceSchedulingHorizon: The EnforceSchedulingHorizon parameter enforces an end date for recurring meetings based on the value of the BookingWindowInDays parameter. Valid input for this parameter is $true or $false. When BookingWindowInDays is 0, an end date isn't enforced for any recurring meetings. When BookingWindowInDays is greater than 0 and EnforceSchedulingHorizon is $true, the recurring meeting request is automatically declined if the end date is greater that the value specified by BookingWindowInDays. When BookingWindowInDays is greater than 0 and EnforceSchedulingHorizon is $false, the end date of a recurring meeting is automatically truncated to the value specified by BookingWindowInDays. http://technet.microsoft.com/en-us/library/dd335046.aspx However with this configuration (BookingWindowInDays=0 and EnforceSchedulingHorizon=False) users are unable to book a room and get the following message: Your meeting request was declined. This resource can only be scheduled up to 0 days in advance. The end time should fall before 11/25/2010 . This seems to indicate that the information in the technet article is incorrect, or am I configuring the calendar processing incorrectly? Thanks Dan

Hi, Yes, the information relating to BookingWindowInDays is not correct. The value of 0 actually defaults to be the same as a value of 1 for the booking window. There is no way to effectively make an infinite booking window. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks Gen Lin-MSFT