I can reproduce this issue on the latest released versions of both CIPP and CIPP-API.
I have searched existing issues (both open and closed) to avoid duplicates.
I am not requesting general support; this is an actual bug report.
The tooltip on the field where you edit the Maximum Booking Duration is incorrect. It limits the field to 1440 minutes and states that is the maximum duration allowed. Per Microsoft's documentation, "A valid value is an integer from 0 through INT32 (2147483647). The default value is 1440 (24 hours)."
https://learn.microsoft.com/en-us/powershell/module/exchangepowershell/set-calendarprocessing?view=exchange-ps#-maximumdurationinminutes
Validated by setting a higher value through the Microsoft 365 Exchange Admin center.
The limit on the field should be changed and the tooltip for it updated to reflect the true value allowed by Microsoft.
Steps to reproduce.
Go to Email & Exchange
Resource Management
Rooms
Actions
Edit Room
Update 'Maximum Booking Duration (Minutes)' field
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v8.6.0
v8.6.0
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Released
Bug / Fix
4 months ago

Kelvin Tegelaar
Get notified by email when there are changes.
Released
Bug / Fix
4 months ago

Kelvin Tegelaar
Get notified by email when there are changes.