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Exchange Server 2019 Enterprise
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- Transferable license (online activation)
- License for 1 server
- License with no expiration date
- License certificate
- Documentation in accordance with the EU laws (Seller's Declaration)
- Confirmation of purchase (invoice)
- Installation file to download
See the full list of requirements here: https://docs.microsoft.com/en-us/exchange/plan-and-deploy/system-requirements?view=exchserver-2019