When submitting a report that will include data for more than 50,000 certificates, you see this error message:
The default maximum number of rows to include in a report is 50,000. This can be increased by adding a registry key on the TPP server. The key is:
"Report Max Source Record Count"=dword:00020000
The record count value in the registry is a hex value, so that 20000 above translates to 131072 (which is also displayed in regedit), but you have to set the value in hex. Note that this is a per server setting, so you would need to make this change on all TPP servers that are going to generate reports that will have more than 50,000 elements included.
This key does not exist by default, and if not present, the default value (50000 rows) is used.