Error when creating public folder migration endpoint

  • Article
  • Applies to:
    Exchange Online

Original KB number:  4052729

Symptoms

When you run the New-MigrationEndpoint cmdlet to create a PublicFolder or PublicFolderToGroups type of migration endpoint in Microsoft Exchange Online, you get one of the following error messages:

MAPI provider is not supported for mailbox with version <VersionNumber> on server <ServerName>.

Write-ErrorMessage : |Microsoft.Exchange.Data.Storage.Management.MigrationTransientException|

Cause

These errors occur because the following mailboxes aren't on the same server:

  • The primary hierarchy public folder mailbox.
  • The organization mailbox that's named SystemMailbox{MailboxID}. (This is a type of arbitration mailbox.)

Resolution

To resolve this problem, make sure that the databases that host these two mailboxes are on the same server. To do this, follow these steps:

  1. Locate the database that hosts the primary hierarchy public folder mailbox by running the one of the following cmdlet options:

    Option 1

    Get-Mailbox -PublicFolder | ?{$_.IsRootPublicFolderMailbox -eq $true} | ft name,database
Get-MailboxDatabaseCopyStatus <database returned from the first cmdlet>

    Option 2

    Get-MailboxDatabase (Get-Mailbox -PublicFolder | ?{$_.IsRootPublicFolderMailbox -eq $true}).database | Get-MailboxDatabaseCopyStatus

  2. Locate the database that hosts the primary hierarchy public folder mailbox by running one the following cmdlet options:

    Option 1

    Get-Mailbox -Arbitration | ?{$_.name -like "SystemMailbox{MailboxID}"} | ft database
Get-MailboxDatabaseCopyStatus <database returned from the first cmdlet>

    Option 2

    Get-MailboxDatabase (Get-Mailbox -Arbitration | ?{$_.name -like "SystemMailbox{MailboxID}"}).database | Get-MailboxDatabaseCopyStatus

  3. If the databases that host the primary hierarchy public folder mailbox and the arbitration mailbox have a copy on the same server, activate both database copies on the same server.

    Otherwise, move the arbitration mailbox or the primary hierarchy public folder mailbox so that both mailboxes are on the same server.