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File Transfers in Microsoft Lync Online

I was recently involved in an issue with file transfers failing between two Lync Online federated tenants. This had worked before, so I was surprised to read it was not supported. The Microsoft Lync Online for Enterprises Service Description (as of October 24, 2011) states:

> File transfer is not available with federated connections

With help from an engineer at Microsoft we figured out the issue was an older Lync client.

One peer had version 4.0.7577.280 of the Lync 2010 client instead of the latest version 4.0.7577.314. After upgrading the Lync 2010 client to the latest release (see Description of the cumulative update package for Lync 2010: July . . . → Read More: File Transfers in Microsoft Lync Online

Microsoft Lync 2010 Client Logging

A quick post for a commonly needed reference. Others might find it useful.

Lync 2010 Client logging is turned on/off in the Options | General settings as shown below.

| | | | | | | | The Lync client needs to sign-out and sign-back-in for the settings to take effect.

The log files are stored in:


On Windows 7 or Vista this will equate to c:\users\<user name>\tracing.

The first option generates a UCC API file (e.g. Communicator-uccapi-0.uccapilog). The second option generates *.etl files.

The UCC API is the API the Lync client uses to talk to the Lync server. The Snooper.exe utility can be used to . . . → Read More: Microsoft Lync 2010 Client Logging