Hi @Михалевский Андрей Андреевич ,
To migrate from Exchange 2007 to Exchange 2019, you need to migrate from Exchange 2007 to Exchange 2013 as a transition first, and then from Exchange 2013 to Exchange 2019.
Upgrade from Exchange 2007 to Exchange 2013: https://learn.microsoft.com/en-us/exchange/checklist-upgrade-from-exchange-2007-exchange-2013-help
Related reference for direct migration: https://www.stellarinfo.com/blog/exchange-2007-to-2019-migration/
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