Our website started showing a significant increase in traffic. When investigated we found each ip logged is hitting website 100's of time in a day in some cases number is in 1000s.
User-Agent: OC/15.0.4551.1007 (MicrosoftLync)
Is this some sort of malware attack via Lync as the requests to our website is constantly increasing with higher frequency every hour. If so, how can this be prevented.?