How to Fix PowerShell Has Open Files Error at Installing the Exchange 2016 Cumulative Update 23

When I tried to prepare the AD schema for installing Exchange 2016 CU23, and it happened the error message is below.

“Setup can’t continue with the upgrade because the powershell has open files” error message.

Let’s fix it.

1. Close any PowerShell and Exchange Management Shell and Exchange Admin Center sessions and run the upgrade command again.

2. If it happened the same error after running the upgrade command. Please open Windows Command prompt as administrator and run the upgrade command again.

I hope you enjoy this post.

Cary Sun

Twitter: @SifuSun

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