Symptoms
Consider the following scenarios.
Scenario 1
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In the MsExchangeMailboxReplication.exe.config file, you set DefaultCompletedRequestAgeLimit to 0.00:10:00, and then you restart the Mailbox Replication Service (MRS).
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You run the following cmdlet:
New-MailboxExportRequest -Mailbox Administrator -Name Export1 -Filepath "\\localhost\c$\temp\Export1.pst" -
Before 10 minutes expire, you delete or move the .pst file.
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After the timer expires, the job is picked up, and a new .pst file of 265 K is created.
In this scenario, if the .pst file is not deleted, its modified time will change, and its size will increase by 248k.
Scenario 2
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You run the following cmdlet:
Run New-MailboxExportRequest -Mailbox Administrator -Name Export2 -Filepath "\\localhost\c$\temp\Export2.pst"
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After the export is finished, you run the following cmdlet:
Get-MailboxExportRequest | Remove-MailboxExportReqeust
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After about 24 hours expire, the job is picked up, and a new .pst file of 265k is created.
In this scenario, if the .pst file is not deleted, its modified time will change, and its size will increase by 248k.
Resolution
To fix this issue, install one of the following updates:
Cumulative Update 11 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019
Cumulative Update 22 for Exchange Server 2016 or a later cumulative update for Exchange Server 2016
References
Learn about the terminology that Microsoft uses to describe software updates.
