Microsoft Lync Error: Microsoft.Rtc.Common.Data.SqlConnectionException Cannot open database xds requested by the login. The login failed. Login failed for user Domain\administrator.

Lync

Error:

An error occurred: .Rtc..Data.SqlConnectionException Cannot open database xds requested by the login. The login failed. Login failed for user CONTOSO\administrator.

When Installing there is automatically added a firewall rule that opend the port for the Service

Solution:

Create a Firewall port exceptions to enable access to the Browser service, follow these steps:

    1. Click Start, and then click Control Panel.
    2. Open the Firewall program.
    3. Click Settings to open the Firewall Settings dialog box.
    4. Make sure that Firewall is turned on, and then click the Exceptions tab.
    5. Click Add port to open the Add a port dialog box.
    6. Enter a name for the port exception, such as Browser Service.
    7. Make sure that UDP is selected, and then enter UDP port number 1434. This is the default port that the Browser service listens on.
    8. Click OK two times to close the Firewall Settings dialog box
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