Enabling Managed Folder Assistant Error

Question

When trying to start managed folder assistant on a shared mailbox with online archiving enabled, I am getting an error in powershell:

The call to Mailbox Assistants Service on server: 'DM6PR07MB4555.namprd07.prod.outlook.com' failed. Error from RPC is -2147220992.
+ CategoryInfo : InvalidOperation: (:) [Start-ManagedFolderAssistant], TaskException
+ FullyQualifiedErrorId : [Server=PH0PR07MB9251,RequestId=ff1753ea-7703-430c-884a-91ba0713578b,TimeStamp=8/15/2022 4:37:23 PM] [FailureCategory=Cmdlet-TaskExceptio
n] C5CED160,Microsoft.Exchange.Management.SystemConfigurationTasks.StartElcAssistant
+ PSComputerName : outlook.office365.com

What can cause this error and how do resolve it?

Answer 1

Answered my own question:
had to get the GUID of the primary mailbox using this command:
get-mailboxLocation –user user@ssss .com.au | fl mailboxGuid,mailboxLocationType

Then run Start-ManagedFolderAssistant [Primary GUID]

Answer 2

Hello,

This may be due to some issue locating the mailbox GUID of this user, please try the next:

First get the GUID:
get-mailboxLocation –user <username@keyman > | fl mailboxGuid,mailboxLocationType

Then use the cmdlet using the GUID instead of the user:

Start-ManagedFolderAssistant <mailboxGUID>

Reference: https://learn.microsoft.com/en-us/archive/blogs/timmcmic/office-365-start-managedfolderassistant-in-office-365

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