Sage 50 , Sage 1000 transactions/convert to Sage 300

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Good day to all,

I have a client that has acquired some other companies some running currently on Sage 50 and some on Sage 1000 all French speaking. The main company ( consolidated holding company and associated companies currently running Sage 300 (2018).

They would like to bring all their associated companies onto same platform Sage 300. The difficulty for me now is to find a way to convert/ extract- import the other companies from sage 50/1000 to Sage 300, Anyone done this before ? any help apreciated