Are you using Google Apps? Ready to upgrade to a single-sign-on for your various Google services, but the options hasn’t become available yet? It’s probably not shown up because you made an account for your Apps email outside of Apps. Yeah – it’s really confusing. Hopefully merging them will help. So here’s how!
If you don’t see this screen yet in your admin panel:
Then go to this URL manually:
Any other questions? All sorts of help and questions answered on Google’s’ help pages.
Not all of your accounts will migrate, for example if you have an account firstname.lastname@example.org and that was used to create AdSense, AdWords (and others) they will block the migration of email@example.com until Google patches their system. Other accounts will migrate properly.
Strange – I've done this successfully with accounts I've used elsewhere without a problem.