I was not able to reproduce the described behavior locally. I have tested the RadScheduler inside a RadMultiPage and the appointments are saved correctly. Would you share with us what is the version of our controls that you are using?
Could you paste the code of the RadScheduler and the RadMultiPage by which you think this behavior is caused or send us a support ticket with the issues isolated in a sample page? This way we will be able to test this behavior locally and determine the cause of it.
the Telerik team
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