I have over 7+ years of experience and have handled over 200+ migrations ( Exchange on-premise to Exchange online, Lotus to Office365, G-suite to Office365) with 100% success rate.
I am new to freelancer but certainly not to the kind of issue you need assistance with..
I have a PPT along with SOAP already handy which would disclose step by step instructions that I would be performing to complete this migration process..
Let me know when we can connect, I can share those relevant documents with you.
I am also a Microsoft Exchange Certified professional, you can validate my transcript from the link given below:-
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Transcript ID:- 1254617
Access Code:- 97854789