troubleshooting Question

Exchange ASP Version issue

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labdunn asked on
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I have Exchange 2013 installed on a 2008R2 server.  All seemed to be working well including OWA, Activesync and EAC until I installed TrendMicro's Scanmail antivirus software.  It seems to have broken IIS.  

When I try to use any of these services I get a page that says "Server Error in '/owa' Application.  The more useful message I get is in the application log.  I am seeing event ID 1310 each time a user or device tries to access the server.  I'll attach the entire message below but the essence of the message is "This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded. "  I'm thinking the TrendMicro install used older software than Exchange but I don't know how to change it back.

Thanks for any help.

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