Delete All Calendar Entries In An Exchange 2010 Mailbox

1. Open EMS
2. Run: Search-Mailbox –identity username –SearchQuery kind:meetings –DeleteContent 
3. You can get an estimate about the number of entries and size that will be freed up after deletion by running:
4. Search-Mailbox –identity username –SearchQuery kind:meetings –EstimateResultOnly 

 

Example:

Search-Mailbox –identity mmcguire –SearchQuery kind:meetings –DeleteContent