Exchange 2013, Outlook clients cannot access Free/Busy, out of office, or mailtips

Hi everyone, installed some updates to my Exchange 2013 Server running on Windows Server 2012 and now uses using Outlook 2010 cannot see free/busy items (for people they try to invite to meetings) when trying to use the Calendar's scheduling assistant. They can also not access their Automatic Replies area or mailtips.

They CAN access these features if they logon to the Outlook Web App (OWA).

The Exchange Server throws this error when you try to access any calendar views that can no longer display the details. I grabbed just a few items from the full error.

Event ID:1310
Event code: 3008
Event message: A configuration error has occurred.
Event time: 10/14/2014 11:41:12 AM
Event time (UTC): 10/14/2014 3:41:12 PM
Event ID: c19fc07824a84bef8ef070eed9eef30f
Event sequence: 1
Event occurrence: 1
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/2/ROOT/EWS-105-130577748725182846
    Trust level: Full
    Application Virtual Path: /EWS
    Application Path: C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\exchweb\EWS\
    Machine name: USBOSEX02
Could not load file or assembly 'Microsoft.Exchange.Services' or one of its dependencies. The parameter is incorrect. (Exception from HRESULT: 0x80070057 (E_INVALIDARG))

I rebuilt the EWS virtual directory from the ECP and this had no change. Looks like the EWS in IIS is an Application not directory. Any ideas anyone?

Thanks!
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MikeC7Asked:
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Joshua GrantomSenior Systems AdministratorCommented:
I would re-install/repair .NET 4.5, I believe something was corrupted by the updates.
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Gareth GudgerCommented:
See when errors you get when you use the Synchronization, Notification, Availability, and Automatic Replies test at www.Exrca.com.
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MikeC7Author Commented:
Hi everyone just to follow up I ended up deleting a folder on the Exchange server and it recreated itself on a restart and everything worked!
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MikeC7Author Commented:
Worked.
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tmaususerCommented:
What folder do you delete?
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