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Reference Materials for Migration 8.14 - Public Folder Synchronization (MAgE)

About This Document How It Works Before You Begin Public Folder Synchronization Workarounds Technical Reference

New public folders added

After migration starts, some never sync public folders are added and need to be synchronized.

Take the following steps to synchronize these new public folders:

  1. Call Stop-MMExAgent -Type PublicFolder -AgentHost <agent host name>
  2. Prepare updated CSV file using Export-MMExPublicFolderMapping cmdlet, you can also create new CSV file (only new folder can be included) manually.
  1. Call Import-MMExPublicFolderMappingcmdlet using updated CSV file.
  2. Call Stop-MMExAgent -Type PublicFolder -AgentHost <agent host name> to stop MAgE before synchronization start.
  3. Call Initialize-MMExPublicFolderMigration cmdlet using updated CSV file.
  4. Call Start-MMExAgent -Type PublicFolder -AgentHost <agent host name> to start synchronization.

You can see added public folders in the statistics with Get-MMExPublicFolderStatistics.

Synchronizing public folders containing more than 10000 elements from Exchange 2010

This section is applicable in case Microsoft Exchange 2010 as source.

In case source public folder contains more than 10000 elements it can take a while to gather necessary information related to content. It may cause MAgE cannot read necessary information or fails to transfer the content of such folders. In case the Progress value for a public folder returned by Get-MMExPublicFolderStatistics does not grow, and this public folder contains more than 10000 elements, you can take the following actions:

  • Reduce the number of elements in a folder by dividing into several public folders


  • In Public Folder Management console open the public folder properties to clear Maintain per-user read and unread information for this folder option until the migration is complete.

Technical Reference

Cmdlet Reference

This is a collection of Windows PowerShell cmdlets to perform public folder synchronization for supported configurations:

Starting public folder migration in simple mode with minimal customization

Configuring public folder synchronization in advanced mode

Managing public folder synchronization (granular synchronization)

Monitoring public folder synchronization

Managing Migration Agent for Exchange (MAgE)

For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax (

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