Lync HA poster

Lync Server 2013 On-Premises Architectures Poster http://www.gelijsteen.com/2014/lync-server-2013-premises-architectures-poster

Skype-Lync video

Microsoft Lync-Skype connectivity v2 – Adds Video and More http://blogs.technet.com/b/nexthop/archive/2014/02/18/microsoft-lync-skype-connectivity-v2-adds-video-and-more.aspx

Lync SQL mirror troubleshooting

To move all DB back tpo the primary SQL run in the FrontEnd PowerShell 

Invoke-CsDatabaseFailover –PoolFQDN fepoolname.domain.loc –DatabaseType User –NewPrincipal primary -verbose

Invoke-CsDatabaseFailover –PoolFQDN fepoolname.domain.loc –DatabaseType User –NewPrincipal primary

Invoke-CsDatabaseFailover –PoolFQDN fepoolname.domain.loc –DatabaseType App –NewPrincipal primary

Invoke-CsDatabaseFailover –PoolFQDN fepoolname.domain.loc –DatabaseType CentralMgmt –NewPrincipal primary

Invoke-CsDatabaseFailover –PoolFQDN fepoolname.domain.loc –DatabaseType Monitoring –NewPrincipal primary

If Mirror is shown as suspended - log to current holder of primary SQL for this db and pass SQL query

ALTER DATABASE SET PARTNER RESUME

http://technet.microsoft.com/en-us/library/ms191125(v=sql.105).aspx

Then try again  Invoke-CsDatabaseFailover 

Lync edge testing tool

Lync Edge Testing Suite (Part 1) – Lync Edge Port Tester Tool http://www.mylynclab.com/2014/02/lync-edge-testing-suite-part-1-lync.html