Thomas.Poett@TEAMS (MVP Teams and Cross-Tenant M&A/D Migration Expert Lead)

Microsoft has changed the possibility for Skype for Business On-Premises users to Microsoft Teams. Skype for Business Online was retired since July. Therefore, the only possible hybrid setup is for Teams, the TeamsOnly mode. Modi other than TeamsOnly can only be used under the following conditions: - New Subscription/ Tenant: if a SfB on-premises DNS is detected ( LyncDiscover ), pointing to an On-Premises installation (any other setting than M365 sipfed.online.lync.com )  The tenant is automatically created in ISLAND mode! - Existing Tenant: if LyncDiscover is found and the DNS record in NOT pointing to M365, a TeamsOnly mode is removed and revert to ISLAND mode. This is valid for at least one of all DNS verified domains and the  TeamsUpgradeOverridePolicy/  TeamsUpgradePolicy apply. Configure hybrid connectivity - Skype for Business Hybrid | Microsoft Learn Tools for upgrading to Teams from a Skype for Business on-premises deployment - Microsoft Teams | Microsoft Learn...

Lync Certificate Planning and Assignments (Edge, Reverse Proxy, Director, Frontend, Mediation, WAC) Download the article as PDF: SlideShare Link (here) The following article is optimized for Lync 2013, but in general valid for Lync 2010 or OCS 2007 NOTE: First I need to highlight; Lync Server and Client make use of Certificates, therefor the technical principals of certificate deployments are necessary to understand. If on your Clients or Servers an Internet Explorer Setting with a Proxy Server is activated, make sure you have the correct design. The CRL (Certificate Revocation List) check is mostly HTTP based (in AD Environments also possible via FILE or LDAP), if you have setup an internal Proxy, which cannot redirect the request into your LAN, you will run into major issues!   I wrote another article in 2012 which maybe from interest for you too: Forefront TMG – Directors, Front End and Standard Edition for Lync GENERAL Lync Certificate Planni...