Hi @SatyaNi-6581 ,
From your description, did you encounter the scenario like the following screenshot?
If the default permissions are set to None or Contributor, no free/busy information is displayed.
The mailbox owner can work around this issue by changing the default permissions to Free/Busy time or Free/Busy time, subject, location.
Right clicking on the Calendar folder and choosing: Sharing Permissions
My Organization: Can view when I’m busy
Hope that may help you!
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