Webdav shared review not working after installing adobe acrobat pro DC

I was using Adobe Acrobat 9 and my shared reviews where working fine with WebDav server. Two days before i installed the new acrobat pro DC version with update 2015.023.20070 my shared review is not working. I cannot able to connect my webdav server when creating new shared review pdf. My iis logs is telling.

2017-04-11 16:24:36 <our server> PROPFIND /docs/com.adobe.acrobat.webdav.writeability.txt - 80 - 12.159.252.170 Mozilla/3.0+(compatible;+Acrobat+Annots+17.9.20044+) - 404 0 2 15

2017-04-11 16:29:10 <our server>PUT /TestWebDav/com.adobe.acrobat.webdav.writeability.txt - 80 - 76.92.166.64 Mozilla/3.0+(compatible;+Acrobat+Annots+8.0) - 401 0 5 218

Please help on this.

Thanks

Feroz