Much obliged, Rui-PC.
No you can not! The OCR is only available when you do a scan directly from the device.
For that you need external software like Xerox Scan to Desktop (Nuance Paperport) or ScanFlow Store.
If you have not already resolved this issue, we suggest you search our online knowledgebase for this product: WorkCentre 7545.
Alternatively, you can visit our Contact Us page for other support options.
We're still trying to figure out a 7545, which can read from USB to print a file to paper, and can scan paper to OCR and save to USB.
Can this machine OCR from an existing file on a USB drive and save back to USB? I mean, without the intervening steps involving paper?