Disable Flash Update notifications

Thanks for the additional information.

Which installer type (EXE or MSI) do you use to deploy Flash Player?

Please post a screenshot of the path for the registry entry HKEY_CURRENT_USER\Software\Macromedia\FlashPlayerUpdate > proc

e.g.:

In addition to viewing the screenshot of Update Notification you're getting, I'd like to examine the mms.cfg file you're using.  Please upload it to cloud.acrobat.com/send (see How to share a file using Adobe Document Cloud​) and post the link to the uploaded file in your reply.  Please do not paste the contents of the file in your post, upload the actual file.

Disabled Adobe Flash Player Update Service, AdobeFlashPlayerUpdateSvc

This is the Background Update Task and Service.  It has nothing to do with the Notification Update workflow.

For the NPAPI plugin, is there a Task named 'Adobe Flash Player NPAPI Notifier' present on an impacted system?

We do update, just not as fast as Adobe releases their updates.  We would prefer to deploy ourselves and not use Adobe updates.

Have you considered hosting the Background Updates locally?  When customer's host the Background Updates locally it completely prevents the Notification Update dialog from displaying.  For more information, see the 'Performing a background update' section, in chapter 3, of the Flash Player Admin Guide

I also updated Adobe Reader at the same time.  Could Adobe Reader be the one asking for an update to Flash?

Reader and Flash Player update mechanisms are completely separate and this scenario is not possible.

Thank you in advance.

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Maria