: Some users find it via the Adobe FTP server, though most modern browsers block FTP links; you may need a dedicated FTP client.

Adobe follows a relatively consistent naming pattern for its updater MSP files. The name acrobatupd11023.msp can be deconstructed as follows:

: This patch is exclusively for Acrobat XI (Pro or Standard). If you have Adobe Reader, this file will not work; you would need AcroRdr... instead.