Копировать это плохой путь
Ваш вариант тут, скорее всего все починится
https://docs.microsoft.com/en-us/exchange/troubleshoot/client-connectivity/exchange-security-update-issuesResolution
If this occurs, run the following scripts to restore the configuration for OWA and ECP. The scripts can be found in the folder: \Program Files\Microsoft\Exchange Server\v15\Bin\ directory. (Where “V15“ will be “V14” for Exchange 2010) The scripts are located in the following location: \Program Files\Microsoft\Exchange Server\v15\Bin\ directory. Where “V15“ will be “V14” for Exchange 2010.
Run the scripts .\UpdateCas.ps1 and .\UpdateConfigFiles.ps1.
Then go to a command prompt as administrator and run iisreset.