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Office 365: Start-ManagedFolderAssistant in Office 365

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In Office 365 administrators can invoke the managed folder assistant by using the start-ManagedFolderAssistance command.

 

PS C:\> Start-ManagedFolderAssistant tmcmichael@domain.com

 

This week I had a customer present with an issue where the invocation of the managed folder assistance was failing with a generic RPC error.

 

“The call to Mailbox Assistance Service on server: ‘NAME’ failed. Error from RPC is –2147220989”

 

When this error is encountered subsequent retries of the same command can be successful.

 

The error can sometimes occur as portions of mailboxes are being initialized within the service.  For example - if a secondary archive is being provisioned off a main archive.

 

As a potential workaround to this issue the primary mailbox GUID can be specified in the start-ManagedFolderAssistant command. 

 

get-mailboxLocation –user tmcmichael@domain.com | fl mailboxGuid,mailboxLocationType

 

MailboxGuid : aace1f4e-5181-4855-a0c7-466f1fe2f1d1

MailboxLocationType : Primary

MailboxGuid : c2098d94-d55b-4a06-9b52-d485c54e9a19

MailboxLocationType : MainArchive

 

This command will dump the mailbox types and GUID of all mailboxes associated with a user.

 

From the list we can locate the primary mailbox and the mailbox GUID.  Using this mailbox GUID we can invoke the managed folder assistance.

 

PS C:\> Start-ManagedFolderAssistant aace1f4e-5181-4855-a0c7-466f1fe2f1d1

 

When utilizing the GUID we can minimize the change that any initialization process does not cause the command to fail.