Hey @isaac parsons
If you navigate to https://learn.microsoft.com/en-us/azure/active-directory/enterprise-users/licensing-service-plan-reference you can scroll down to the Exchange plans under Enterprise Mobility + Security G5 GCC:
You can also use CTRL+F and type the work EXCHANGE and search the page for all the plans that include it.
You can also download the CSV version here.
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If this is helpful please accept answer.