Sometimes IIS or IIS permissions go corrupt or just leave the planet for different reasons. When you need to delete and recreate these folders do the following… Back up the IIS Metabase on your Exchange Server: Start IIS Manager. Right click the Default Website, choose All Tasks, and click Save Configuration to a File.  Now delete the OWA virtual directories:  Right click Exadmin and click Delete. When prompted if you are sure click Yes. Now delete the below listed virtual directories: Exchange ExchWeb Microsoft-Server-ActiveSync OMA Public Close the IIS Manager. Open the command prompt. Change to (driveletter:)inetpubadminscripts Type adsutil, and hit Enter. Click Yes when prompted to register CScript as your default host for VBscript and then click…