The framework for legally deploying and using Microsoft Exchange Server or Exchange Online, based on server and client access models.
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You do not need Exchange Online Plan 2 to run a message trace.
Message trace is available for Exchange Online, including Exchange Online Plan 1 and Microsoft 365 plans that include Exchange Online (such as Microsoft 365 E3 or E5). The key requirement is having the appropriate permissions, not a specific Exchange Online license.
To perform a message trace, your account must be assigned one of the following roles in the Exchange admin center:
- Exchange Administrator
- Global Administrator
- Organization Management role group
I hope this helps.
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