lync cannot verify that the server is trusted for sign-in address. Connect anywhere? Trusted Domain List in lync

lync cannot verify thar the server is trusted for sign-in address connect anywhere? This dialog box may recieve when you first log in lync using auto configuration, if you connect whit manual configuration this dialog never will show.


what is this means and why it appears?

when your lync client is trying connect server it first search srv record, when client identifying  a record to connect to, domain of the rocord is compared to the trusted domain list. if domain is trusted, of course connection is attempted, if not, it asks you if you trust to this connection.

which domains are in trusted domain by default? and where is this domain list?  it is registry

first it will see list that is in local machine configuration HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Communicator\TrustedModelData


then HKEY_CURRENT_USER\Software\Microsoft\Communicator\TrustedModelData you can add your server domain name in list, in my case it is llab-lync.llab.corp, you can also add llab.corp and all subdomains will be in trusted list.







if your lync server domain name is not in one of this list, lync asks you about trusted connection.




so in my mind the best way to add you lync server domain name in trusted list is gpo that add registry keys in every domain computer.

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About the author

Giorgi Jambazishvili
System Administrator
Ministry of Justice of Georgia