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Exchange 2013/2016/2019: Increase calendar booking window from 180 to a higher value.

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In Exchange, you may notice that when you try and book a meeting room, you cannot go higher than 180 days. This is by default.

To change this, you can run a simple PowerShell command and increase the value, take note you cannot go higher than 1080 days.

The command to change this is as follows:

Set-CalendarProcessing -Identity "Boardroom" -BookingWindowInDays 365

https://everything-powershell.com/wp-content/uploads/2021/01/image-4.png

Give it time to replicate and then you should be able to increase the Booking Window.