Attachments with extensions like xlsx and docx will open in the correct external application but with a wrong name.

Document ID : KB000010139
Last Modified Date : 14/02/2018
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Introduction:

If a .xlsx or .docx attachment is opened with IE11, the appropriate application (Excel, Word) opens, but the displayed filename is always "UploadServlet" for files with the extension .xlsx and "pdmweb.exe" for files with the extension .docx.

How can this be avoided?

Environment:
CA Service Desk Manager 14.1
Instructions:

Please add the file extension like xlsx, docx to the web.xml 
ServiceDesk out of box ships with some extension like doc, xls etc

In the servicedesk tomcat web.xml
(eg C:\Program Files (x86)\CA\Service Desk Manager\bopcfg\www\CATALINA_BASE\webapps\CAisd\WEB-INF\web.xml)
Include the docx, xlsx as below:

<param-name>save_as_dialog_ext</param-name>
<param-value>mp3,eml,doc,zip,gz,tar,xls,rtf,ppt,pps,msg,jpeg,jpg,png,docx,xlsx</param-value>

You need to recycle the ServiceDesk Tomcat service afterwards.