DTM - User Re-activation Issue

[#1]

We are trying to activate a user back to the Adobe DTM and user is not able to register and user is unable to register through password recovery. Any help is appreciated.

[#2]

These forum posts may help you out - 
http://help-forums.adobe.com/content/adobeforums/en/marketing-cloud-forum/activation.topic.html/foru...
http://help-forums.adobe.com/content/adobeforums/en/marketing-cloud-forum/activation.topic.html/foru...

Regards,
Saurabh Kumar.