This dialog box appears during sign-in or after you sign in.
The dialog box may be displayed in the following scenarios:
- During sign-in to Lync to connect to the Lync server
This means that the name of the Lync server that you are trying to connect is not trusted yet. Therefore, Lync requests confirmation from you.
- After sign-in to Lync to connect to Exchange server
After you are signed in, Lync tries to connect to your Microsoft Exchange Server mail server. This connection is required to provide you with rich Lync features. If your Lync sign-in address differs from your Exchange address, the dialog box that has the prompt is displayed. Otherwise, the dialog box is not displayed.
- In the dialog box, click to select the Always trust this server, do not show me this again check box.
- Click Connect.
To prevent the dialog box from being displayed, you can edit the following REG_SZ registry value:
- Start Registry Editor.
- Locate, and then double-click the TrustModelData egistry value:
- Add the Fully Qualified Domain Name (FQDN) of the server-based computer that is displayed in the Trust Model Dialog to the existing value data that is listed in the TrustModelData registry value.
Note If the user’s Exchange mailbox domain server address differs from the Lync sign-in domain server address, the Trust Model Dialog box may appear after the user signs in. Administrators can use this procedure to append the Exchange mailbox domain server address to the value data of the TrustModelData registry value.
There are no Windows Active Direcrory Group Policies that can be used to manage the Lync 2010 TrustModelData registry value. Group Policy for the Lync 2010 TrustModelData registry value can be managed through manual registry edits on the Windows client-based computer or automated registry edits that are administered globally on the network to the Windows client-based computers. The following is an example of these registry locations to update:
Article ID: 2531068 - Last Review: Jul 7, 2015 - Revision: 1