Booking room calendars over 180 days out on Exchange 2010 (affects Exchange 2007 also).

While booking a recurring event with a room calendar, I receive the message "This resource can only be scheduled up to 180 days in advance". Actual e-mail below. I was booking a biweekly event for a year.

-----Original Appointment-----
From: Training Room
Sent: Friday, November 21, 2014 5:16 PM
To: removed
Subject: Declined: Sales Meeting
When: Tuesday, June 09, 2015 8:30 AM-10:00 AM (UTC-05:00) Eastern Time (US & Canada).
Where: Training Room

Your meeting request was declined.

This resource can only be scheduled up to 180 days in advance. The end time should fall before 5/21/2015.

All times listed are in the following time zone: Eastern Standard Time

Come to find out that this is the default setting.

Execute Get-MailboxCalendarSettings "<mailbox alias>" | fl

Look at settings for BookingWindowInDays and EnforceSchedulingHorizon.

Change the setting with:

Set-MailboxCalendarSettings <mailbox alias> -BookingWindowInDays <Days>
OR
Set-MailboxCalendarSettings <mailbox alias> -EnforceSchedulingHorizon  $False

No need to do both.