Guten Tag,
In der Adobe-Supportdatenbank habe ich folgenden Hinweis gefunden:
During the activation process, Adobe Acrobat 8.0 uses a port to connect to the activation site at http://activate.adobe.com at to confirm that the maximum number of activations have not been reached. (...)
Adobe-Hosted and Serial Number Only (retail version) options require direct Internet access to complete the activation process. Adobe License Manager (ALM) uses http://activate.adobe.com to activate. Proxies are hardware or software that restrict access to websites. In order to complete the activation process you may have to add the website to the proxy server's allowed list. Configure Internet Explorer with any applicable proxy information under Tools > Internet Options > Connections > LAN Settings to allow Acrobat to activate. (...)
Quelle: http://www.adobe.com/support/techdocs/333465.html
Eventuell hilft auch der eine oder andere Hinweis aus folgendem Dokument weiter (bezieht sich aber auf Acrobat 7):
http://www.adobe.com/support/techdocs/331419.html
.
als Antwort auf: [#268141]