Where are Exchange logs location for Exchange Server Subscription Edition

Which powershell can I run to see the log age?

Hi Yvonne

Thank you for reaching out to Microsoft Q&A forum.

Based on your question, beside Q&A Assist support, I would like to share some additional information:

In Exchange Server Subscription Edition (SE), log locations are the same as recent on - premises Exchange versions (Exchange 2016/2019), unless they were manually changed in the configuration.

• Main Exchange logging folder: C:\Program Files\Microsoft\Exchange Server\V15\Logging\
• Mail flow & transport logs: %ExchangeInstallPath%\TransportRoles\Logs\

Includes message tracking, protocol (SMTP send/receive), agent, routing, and connectivity logs.

• IIS (OWA, ECP, EWS, ActiveSync) logs: C:\inetpub\logs\LogFiles\
• Exchange setup / upgrade logs: C:\ExchangeSetupLogs\ExchangeSetup.log

Please note that actual paths can be customized. To confirm the configured paths on your server, you can also check via Exchange Management Shell.

For official Microsoft documentation, please refer to: Transport logs in Exchange Server | Microsoft Learn

Checking log age using PowerShell

To check the oldest or newest log files in a specific folder (example: Message Tracking):

Oldest log files

Get-ChildItem "C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\MessageTracking" -Recurse |
Sort-Object LastWriteTime |
Select-Object -First 5 FullName, LastWriteTime

Newest log files

Get-ChildItem "C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs\MessageTracking" -Recurse |
Sort-Object LastWriteTime -Descending |
Select-Object -First 5 FullName, LastWriteTime

To list logs older than a specific number of days (example: 30 days):

$Days = 30
Get-ChildItem "C:\Program Files\Microsoft\Exchange Server\V15\TransportRoles\Logs" -Recurse |
Where-Object { $_.LastWriteTime -lt (Get-Date).AddDays(-$Days) } |
Select FullName, LastWriteTime

To confirm configured log paths (in case defaults were changed):

Get-TransportService | Format-List *LogPath*

I hope these suggestions provide some helpful.

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