Went through PDI and they were able to help me out, below was the information they provided (Cheers!):
You can achieve it through Bulk Administrative Tool (BAT).
Following steps need to be done:
1) Export UM account through BAT:
- Select Operation as "Export", Select object type as "Unified Messaging Accounts"
- Save the CSV file.
- confirm that data is populated properly in exported CSV file.
2) Remove old UM Service
3) Add new UM Service
4) update exported CSV file
- Replace value of "ServiceDisplayName" as newly added UM Service in the exported CSV file.
5) Import the updated CSV file through BAT:
- Select Operation as "Create", Select object type as "Unified Messaging Accounts" and submit it.
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-Ron