I have thousands of users on several servers which need to be re-assigned to new Unified Messaging service accounts, due to throttling limits being hit on the service accounts in their BPOS_D environment.
What is the most efficient and cleanest procedure to first delete the current UM service configured to thier accounts and then to reassign/configure them to the new UM Service? Is there a document that describes this? What exact headings need to be used in the CSV file?
I have successfully removed UM service configurations in the past on accounts with multiple UM services, with the following two headers:
But now when I try to delete the accounts with just one UM Service assigned to it, I get an error stating:
"Unable to delete. Reason: Could not find a unified messaging account with the SubscriberAlias:<alias> ServiceDisplayName and OptionalServiceAccountID"
I have tried the same two headers above with the OptionalServiceAccountID but still get the same message.