Hi @Nitin Bhutani ,
Will this issue occur when user B sends a meeting invitation directly?
- Please try to log in to your mailbox on OWA and check whether the organizer of the meeting is displayed properly.
- Does user C use a mobile device to synchronize calendars through Exchange ActiveSync?
According to the known issues released by Microsoft, when a user synchronize their iOS or Android device by using Exchange ActiveSync, they may unexpectedly become the organizer for a meeting to which they were invited.
You can find the description of the issue in issue 1.2 in the article:Current issues with Microsoft Exchange ActiveSync and third-party devices
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