Google+ is now available for Google Apps accounts

I went to Google+ today and instead of the usual inscription “Google+ is not yet available for Google Apps” I found a message saying “Google+ is not available for your organization.” I went into the management of my domain, brought the switch to the “On” state and gained access to Google+ from an account tied to my own domain.

EDIT: In the comments they write that the connection to the service is not yet available for all domains. Some have encountered a problem when the corresponding setting is already available, but its status is not saved.