Exchange 2019 mailbox with exchagne 2013 EDGE

Hello

I hope some one can help for this.

we have one exchange 2013 server which has mailbox and cas roles, also we have exchange 2013 EDGE for SMTP tier. we are planning to migrate exchange 2013 mailbox server to exchange 219 mailbox .

my question is, if we have latest CU on exchange 2013(both Mailbox and EDGE), once we migrate mailbox to exchange 2019, can we use same old Exchange 2013 EDGE server with new EDGE subscription.

If yes, can you provide some TechNet article.

thanks in advance.

Indunil