Object Not Found in Store When Running Get-MgUserMailFolder

[iperry-indigex]

Running Powershell 7.1.3, see example below.

PS C:\Users\iperry> Connect-MgGraph -Scopes "User.Read.All","Mail.Read","MailboxSettings.Read"
Welcome To Microsoft Graph!
PS C:\Users\iperry> $Members = Get-MgUser -All | Where-Object {$_.UserPrincipalName -NotLike "*#*"}
PS C:\Users\iperry> Get-MgUserMailFolder -UserId $Members[4].Id
Get-MgUserMailFolder_List: The specified object was not found in the store., The process failed to get the correct properties.

I've attempted Connect-MgGraph -ForceRefresh, as well as Disconnect-MgGraph; Connect-MgGraph. I've also verified that the user is a legitimate user. Suggestions?
AB#8987

[peombwa]

This is a service issue. Could you try the following?

• From the docs, you can only get the mailbox folder collection of the signed-in user when in delegated mode. To get the mailbox folder of another user, you will need to authenticate in app-only mode via Connect-MgGraph -ClientId $env:ClientId -TenantId $TenantId -CertificateThumbprint $CertThumbprint.
• Was the user account created recently? If so, you may need to wait for 15 minutes before making the call.

[iperry-indigex]

That (The app-only mode) seems to have been it, thank you.