The "Search Message Tracking Logs" section from the documentation states:
You can't copy the message tracking log files from another Exchange server and then search them by using the Get-MessageTrackingLog cmdlet. Also, if you manually save an existing message tracking log file, the change in the file's date-time stamp breaks the query logic that Exchange uses to search the message tracking logs.
But as the logs are plain text files in a simplistic structure you would be able to rename the log files to integrate them with the existing ones on a different server. The file name is something along
n is an increment with a maximum of 9999. If you have not used a copy method which would pertain the last write access time stamp, you probably would want to set the copied files' last write timestamps e.g. using the
LastWriteTime property of the
FileInfo object accordingly.
Events obviously would not be in a chronological order - this might impact searchability by time (not sure if it really is going to be the case). I simply would try it out with a couple of manually renamed log files and script a renaming function for the rest, if it works out.
You also could pull the data using
Get-MessageTrackingLog and dump it to a file using
Export-Clixml so you could reload it later and filter on the results using Powershell functions, if needed. This however would require you to use a different function to load the object and deprive you of