This Sync Issues subfolder stores mail items that Outlook could not synchronize with the mailbox server.

This Sync Issues subfolder stores multiple copies of conflicting mail items in the mailbox that can significantly inflate the mailbox size as Outlook tries to sync the mail items again and again. This Sync Issues subfolder stores information on mail items that could not be sent to the mailbox server from the local Outlook data file. It contains three subfolders, which are as follows: To view the folder and its subfolders, click the three dots at the bottom navigation pane and choose ‘ Folders.’ These messages are sent by the mailbox server, such as Microsoft Exchange, to inform users about the problems encountered while synchronizing the emails or other mail items in Outlook to or from the mailbox server.īy default, Sync Issues folder and its subfolders are not visible in Outlook. The Sync Issues folder is a special mail folder in MS Outlook that stores messages containing information on synchronization issues and error logs experienced by the client.

Solutions to Fix Sync Issues in Outlook.

Resolving outlook 2016 sync issues