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Article ID: 125566, created on May 20, 2015, last review on May 21, 2015


The installation of the Office 365 Application End-point (Cloud Solution Provider Scenario) fails with the following error message:

Running on CLR version 4.0.30319.34209
Installing required Windows components...
Configuring SVC Handler Mapping...
Unable to find certificate by subject ''.
At C:\Users\Administrator\Downloads\\O365-Web\setup.ps1:345 char:9
+             throw <<<<  "Unable to find certificate by subject '$MOSIClientCertSubject'."
+ CategoryInfo          : OperationStopped: (Unable to find'.:String) [],     RuntimeException
+ FullyQualifiedErrorId : Unable to find certificate by subject ''.


  1. Go to the directory where the content of the extracted file is placed.
  2. Execute the command: makecert.exe -r -pe -n "CN=fake" -b 01/01/2014 -e 01/01/2024 -sr LocalMachine -ss My -a sha1 -sky exchange -eku "fake.cer"
  3. Run the installation script again. Before running the script, set the value of the MOSIClientCertSubject parameter to fake.

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