Migration from skype 2013 on prem to Skype online

Copper Contributor
Hi folks, lots of users have been migrated from on prem skype 2013 to Skype online, they are having issues sign in to lync2010 and skype 2013 client only, they can sign in successfully to Skype client 2016. Is it a known bug?? Thanks
1 Reply
All Users can login to IM via owa, also can login to Skype client 2016 but they can not sign in to lync client 2010 and skype client 2013. Pls suggest.