What can cause multiple copies of Outlook items to appear

[deni02]

Multiple copies of Outlook items can appear for several reasons, including mailbox synchronization, data imports, account migrations, backups, and repeated transfers between systems. The problem may become noticeable only after a large amount of data has been processed. An outlook duplicate items remover can help users identify repeated Outlook information after such operations. Understanding the possible causes can also help users review their mailbox more carefully after future migrations or imports.