Pourquoi j'ai le message que Adobe Digital Editions n'a pu se connecter au serveur d'obtention.

(Note: This question was posted in the Lightroom Classic section of Adobe Community where I am reading it. It is not likely that many Lightroom Classic users are able to help with an Adobe Digital Editions question. It may be better to post this question in the Digital Editions community, or maybe a moderator can move this question there.)

I’m not sure but maybe these problems are connected to Adobe recently transferring Adobe Digital Editions to another company, Harman Connected Services, a division of Samsung. Maybe the servers are being switched over and older app versions don’t know how to connect to them. So the first thing to try is see if there is a newer version of the Digital Editions app that connects to the current servers? (I haven’t used Adobe Digital Editions in years so I don’t know much.)

When I did a web search about this, I found the following Adobe help article, published just a few days ago, on November 20, 2025:

Transition of Adobe eBook platform to Harman - FAQs

(In the quote below, I added the bold formatting)

Ongoing platform support and feature development for Adobe eBook Platform Components (Adobe Content Server, Reader Mobile SDK, and Adobe Digital Editions) is now being handled by Harman Connected Services, Inc., a wholly‑owned subsidiary of Samsung Electronics Co., Ltd. As of July 2025, Adobe transitioned these responsibilities to Harman, including future releases and technical maintenance. Harman now manages and distributes any new updates, enhancements, bug fixes, and support requests directly.

To access the latest versions of Adobe eBook Platform Components (Adobe Content Server, Reader Mobile SDK, and Adobe Digital Editions), report issues, request new features, or receive technical assistance, visit Harman's Digital Editions support channels.

If Adobe does not respond to Adobe Digital Editions questions in this community, you may want to contact Harman Digital Edition support channels as stated in the last sentence of the quote from the linked article. 

Can only think of a few reasons - so I'll throw my hat at the issues

Internet connection or firewall

Even if you are online, a firewall or antivirus may be blocking Adobe Digital Editions (ADE) from accessing the server. Try temporarily disabling your antivirus or firewall and then relaunch ADE.

ADE authorization issue

If your Adobe ID isn’t properly authorised in ADE, it can prevent access to your books. Check by going to Help > Authorize Computer and sign in with your Adobe ID.

Temporary Adobe server issue

Sometimes Adobe’s servers have temporary interruptions. Waiting a few hours and trying again can resolve this.

Outdated ADE version

Make sure you are running the latest version of Adobe Digital Editions, as older versions can cause connection errors.