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

In a special scenario, where I faced certain issue publishing the Lync Topology, where the Lync Frontend Servers are located in Sub Domain, you need to open certain TCP Ports to at least one Root Domain Controller: If you enabled the Lync Topology, you might face this issues: Error : The given key was not present in dictionary. Type : KeyNotFoundException Error : An error occurred when attempting to add "computer" to "RTCGroupxxx" Type : DeploymentException CategoryInfo: InvalideOperation: ([0] Microsoft.R....Core.Service) WebServer:pool.<fqdn> execution failed on an unrecoverable error. Error : Cannot obtain the domain information for computer "Root DC fqdn". Please make sure the computer FQDN is correct. Error : DsRoleGetPrimaryDomainInfromation failed with error "6BA". Just missing are the requirements for Topology publishing. If you are going to enable the Topology, you can use: Enable-CsTopology [-Confirm [<Swit...

If you are installing the Central Management Database (XDS) for a new Skype for Business/ Lync Deplyoment, you might run into an issue if the the SQL Server was installed much earlier than Lync will be. Over the time the Model Database was increased to some new values. It is necessary adjusting the Model Database in SQL back to 2MB, which is requried for initiating a new Database with the Lync integrated script. Therefor you need to login to SQL Server and navigate to the System Databases and right cklick the MODEL DB and SHRINK it back (Database and File) to 2MB The model database is an empty hull for each new database that should be created. If the size is not matching, you run into this common error. In Lync deployment log, you will find the following error: Feature: CentralMgmtStore   11.04.2013 10:18:10          └    SQL Instance: sql01.customer.com   11.04.2013 10:18:10   ...

When something went wrong during any Lync Installation, e.g. Topology was published with Errors and you tried to install a Lync Server, e.g. SBS, STD Edt, ... You might see the following Error: Cannot open database "xds" requested by the login. The login failed.Login failed for user DOMAIN\ADMINUSER I f this is happened, you fully need to uninstall: 1.) All Lync Server Components, beside: - Administrative Tools, Core Components, Resources Kit (if ist installed) 2.) The entire local SQL Instance, including Client Tools ! - Ensure, also the local Folder: C:\Program Files\Microsoft SQL Server\MSSQL10.RTCLOCAL is entirely deleted! 3.) Restart your Server now. If you are now going to reinstall Lync Server, 4.) make sure the Registry Key is clean: Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager PendingFileRenameOperations NOTE: should the Lync Server Replica Replicator Agent should not have been proper uninstalled. You Need to...