The ProviderName property returns the name of the InfoStore's message store provider as a string. Read-only.
objInfoStore.ProviderName
String
A message store provider is a MAPI object that manages one or more MAPI message stores. Each message store is accessible as a CDO Library InfoStore object.
The ProviderName property corresponds to the MAPI property PR_PROVIDER_DISPLAY.
Dim objInfoStore As InfoStore ' assume valid InfoStore object
MsgBox "Message store provider name = " & objInfoStore.ProviderName