Access Denied Error on Exchange Management Shell for Exchange 2013

So I tried opening the EMS tool on our Exchange server and i was getting the dreaded Access Denied error. I was also unable to open the Exchange Toolbox.

First issue i noticed was that the server time was off by 6 minutes. So I got that fixed first.

w32tm is the utility used for that.

But that didnt help with the original error

After having enough of going through the logs for errors, and getting fed up of googling, i came across a forum which talked about two modules used by IIS to support authentication on the Powershell Folders under the Default WebSite, and the Exchange Back-End Site

1. WSMAN
2. KERBAUTH

So I left KERBAUTH module on for the Powershell Folder under Default Website and removed WSMAN module from there.
I enable KERBAUTH and WSMAN for the Powershell folder under Exchange Back-End

Both modules have to be native and local when enabled. You can find them under the Configure Native Modules setting on the right side pane

Its better to run iisreset after any change to the IIS settings to be sure of the effects of your changes.


After setting this combo, both EMS and Toolbox started working.