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This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.

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We are currently utilizing Office 365. &nbsp;Microsoft has been unable to resolve this issue, so perhaps someone on here has seen this and knows a solution. &nbsp;As mentioned, we are on Office 365 using a Federated Server. &nbsp;Calendar Sharing within the Outlook client ceases to work if the Free/Busy with Details permission level is selected, however, OWA allows access to the calendar. &nbsp;Changing the permission level to any other level, such as Reviewer, will fix the issue, and this has been suggested by MS as a workaround. &nbsp;Unfortunately, this is not acceptable to some of our executive staff. &nbsp;<br />
This is easily recreated within our environment on any PC, sharing anyone's calendar with any user. &nbsp;A common MS suggestion is to use powershell to set the permissions, and we have tried that, as well as recreating outlook profiles several times. &nbsp;In all, it appears to be relative to only this permission level. &nbsp;<br />
Any ideas would be appreciative.
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We are currently utilizing Office 365.  Microsoft has been unable to resolve this issue, so perhaps someone on here has seen this and knows a solution.  As mentioned, we are on Office 365 using a Federated Server.  Calendar Sharing within the Outlook client ceases to work if the Free/Busy with Details permission level is selected, however, OWA allows access to the calendar.  Changing the permission level to any other level, such as Reviewer, will fix the issue, and this has been suggested by MS as a workaround.  Unfortunately, this is not acceptable to some of our executive staff.  
This is easily recreated within our environment on any PC, sharing anyone's calendar with any user.  A common MS suggestion is to use powershell to set the permissions, and we have tried that, as well as recreating outlook profiles several times.  In all, it appears to be relative to only this permission level.  
Any ideas would be appreciative.

Office 365 Calendar Sharing - Issue with Free/Busy with Subject Permission

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Office Productivity refers both to the act of being productive and efficient in an office or professional environment, as well as the software applications used to "produce" information. This includes the development of professional skills, creating work processes, and almost any program used to create or modify a document, image, audio or video clip. However, business application suites such as Microsoft Office, which include word processing, spreadsheet and presentation programs, are typically called productivity software, as contrasted with a "utility program," such as a file manager, which is used to organize files and folders on the computer. Many office- and business-oriented groups of programs are organized into suites.