188.8.131.52 User Log
The user log contains the set of users who currently have the workbook open. The iCount field of CUsr (section 2.4.72) specifies the number of UsrInfo records (section 2.4.340) that this section contains. Each UsrInforecord (section 2.4.340) corresponds to a user that currently has the workbook open. The guid field of the UsrInfo maps (section 2.4.340) to the guid field of RRDHead (section 2.4.226) that specifies which revision log (section 184.108.40.206) the user is currently synchronized to.