Lync 2013 WAC Issue "Sorry, PowerPoint Web App Ran into a problem opening this presentation."

Hello Readers,

Currently we are facing Powerpoint presentation issues for Lync 2013 users internal as well as external.

IM, A/V , Polling working fine

Tried scenarios are :

Lync 2010 users to Lync 2013 users: showing presentation at both sides (internal & external)

Lync 2013 users to Lync 2010 users: not showing presentation on Lync 2013 client but showing at Lync 2010 client (internal & external)

Lync 2013 users to Lync 2013 users: not showing presentation at both sides (internal & external)

Below is the error we get

NOTE : This issue occurs due to several errors as I mentioned in below link. Every time whenever you get above error, you simply need to delete the cache from below path shown in the red box.

http://social.technet.microsoft.com/Forums/lync/en-US/0bbf35a5-6518-47d4-a3ee-e756a7e87487/lync-2013-users-not-able-to-share-powerpoint-presentation-internal-as-well-as-external?forum=lyncprofile

After I made several changes in Farm & IISARR rules everything was working fine like Powerpoint presentation sharing internal as well as external.

But after 2 days I was again started getting above error while I was testing sharing Powerpoint presentation between external Lync 13 users.

This issue occurs due to Caching of powerpoint files on Office Web Apps server below path as shown:

Followed this link : http://lynclounge.blogspot.in/2014/07/lync-2013-wac-issue-sorry-powerpoint.html

Special Thanks to Anthony who helped me to resolve this issue.

First stop the Office Web Apps Service on Web apps server & Simply go to the above path & delete or move the data to other path if you need.

Now start the Office Web Apps Service & try to share the PowerPoint presentation files which we get errors.

Now it should work fine without any issues.

Mine Powerpoint presentation sharing is working fine.

Regards

Anand S

NOTE : If this posts helpful to resolve your issue, please comment.