You've been such a great help, thanks! Sorry to be so technically challenged (and slightly paranoid of messing the whole electronic thing up).
No worries, we're all here to help each other. Thanks for putting up with my often too wordy explanations and posts
We did locate his MDE app on his phone and he was able to log in for the first time since 2015! He's never really used it on any of our trips since I do it all.
Our upcoming trip is showing on his MDE app, whew! And he does show up on my ADRs or if I try to 'test book' an LL. But if I look on the 'my magic bands' mine is there (need to charge & link mine still) and it shows 'guests managed by me' as -0-. I see the 'Link your magic band or card' but that seems to be for me to link mine to someone else. His MB+ hasn't been charged or paired yet either. I assume the 1st step will be to charge and link his MB+ to his own MDE, but where to we go from there to link him to mine so I can manage him?
Ok, so you do have SEPARATE MDE accounts which are linked via Family and Friends. So they work independently for some things, and "together" for others. Unlike if you have an account, and manage his.
Because of the separate MDE accounts, you can't manage his MagicBands. The band is linked to his account, so your nDH will need to log into his MDE account on his phone, to Bluetooth pair and connect the band to his phone and update the band's software, and change the settings.
You will be able to share plans. You can book dining, park reservations,
Genie+ LL and Indiviudal LL, on his behalf, and even see each other's photos.
IF he had a Managed Account, it would be something like when we got started with MDE and our son was a minor. I had an MDE account and when we linked our resort reservation, since he didn't, it created a "account" under me, managed by me, without a separate user id and password. So I did all his plans, Magicbands, Family/Friend requests, etc. through my account, as if he was me (but it listed him by his name on my Family and Friends list, and that he was managed by me).
PS, if you can tell me how to 'manage' him after 35 years of marriage, you'll REALLY be my hero!
PPS If there's a 'MB+/MDE for dummies' just point me in the right direction and I'll stop bugging you.
I can't help with you managing him

Sorry. I don't know if there is a MB+/MDE for dummies. Other than the Lightup/Interactions, charging and in park activities which make up the "+" in MB+, MB+ operates exactly the same as the older bands. Its those PLUS features that take some getting used to, and how to set them up.