Exchange calendar full view permission issue

%3CLINGO-SUB%20id%3D%22lingo-sub-1615639%22%20slang%3D%22en-US%22%3EExchange%20calendar%20full%20view%20permission%20issue%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1615639%22%20slang%3D%22en-US%22%3E%3CP%3EHello%2C%3C%2FP%3E%3CP%3EI%20have%20this%20weird%20issue%20where%20for%20some%20reason%20user1%20is%20able%20to%20see%20a%20full%20calendar%20details%20of%20user2.%20There%20is%20no%20delegations%20under%20user2%20on%20Exchange%20admin%20centre%20and%20he%20has%20not%20shared%20his%20calendar%20in%20any%20way%20from%20Outlook%20itself.%20I%20checked%20with%20PS%20the%20following%3A%3C%2FP%3E%3CP%3Eget-mailboxfolderpermission%20-identity%26nbsp%3Buser2%40domain.com%20-user%20user1%40domain.com.%20Which%20confirmed%20with%20a%20message%3A%20%22There%20is%20no%20existing%20permission%20entry%20found%20for%20user%3A%20user1%22%3C%2FP%3E%3CP%3E%3CBR%20%2F%3EAny%20idea%20what%20else%20I%20am%20missing%20to%20check%3F%20Could%20there%20be%20some%20group%20allowing%20this%20access%20and%20how%20do%20I%20find%20out%20which%20one%3F%3C%2FP%3E%3CP%3EI%20also%20checked%20there%20is%20no%20administration%20roles%20assigned%20to%20user1%20or%20user2%20on%20office365%20admin%20portal.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1615639%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Online%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1615780%22%20slang%3D%22en-US%22%3ERe%3A%20Exchange%20calendar%20full%20view%20permission%20issue%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1615780%22%20slang%3D%22en-US%22%3E%3CP%3EAdmin%20roles%20don't%20grant%20you%20permissions%20to%20read%20other%20user's%20calendar%2C%20so%20check%20the%20standard%20mailbox%20permissions%2C%20folder%20permissions%20and%20delegation%20settings.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-1616146%22%20slang%3D%22en-US%22%3ERe%3A%20Exchange%20calendar%20full%20view%20permission%20issue%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1616146%22%20slang%3D%22en-US%22%3EThanks%20Vasil%2C%3CBR%20%2F%3E%3CBR%20%2F%3EI%20already%20checked%20with%20commands%20below%20and%20I%20do%20not%20see%20anything%20why%20user1%20would%20have%20access%20to%20user2%20calendar.%20Not%20sure%20what%20else%20to%20check.%3CBR%20%2F%3EGet-MailboxPermission%20-identity%20user2%40domain.com%3A%5CCalendar%3CBR%20%2F%3Eget-mailboxfolderpermission%20-identity%20user2%40domain.com%3CBR%20%2F%3E%3CBR%20%2F%3EIf%20I%20try%20running%20directly%3C%2FLINGO-BODY%3E
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New Contributor

Hello,

I have this weird issue where for some reason user1 is able to see a full calendar details of user2. There is no delegations under user2 on Exchange admin centre and he has not shared his calendar in any way from Outlook itself. I checked with PS the following:

get-mailboxfolderpermission -identity user2@domain.com -user user1@domain.com. Which confirmed with a message: "There is no existing permission entry found for user: user1"


Any idea what else I am missing to check? Could there be some group allowing this access and how do I find out which one?

I also checked there is no administration roles assigned to user1 or user2 on office365 admin portal.

2 Replies
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Admin roles don't grant you permissions to read other user's calendar, so check the standard mailbox permissions, folder permissions and delegation settings.

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Thanks Vasil,

I already checked with commands below and I do not see anything why user1 would have access to user2 calendar. Not sure what else to check.
Get-MailboxPermission -identity user2@domain.com:\Calendar
get-mailboxfolderpermission -identity user2@domain.com

If I try running directly