Sharing HomeKit problem - Apple ID is not registered with iCloud problem

I have been working on this since 2 weeks.... since the time I got my Ecobee3 thermostat... thanks for some of the comments here but I have not got it working :-)

Trick is, as stated in one of the post, to ensure all ur devices are on 11.2.1 (or hopefully above).

This is what I did:

- upgraded my wife mobile and her iPad to 11.2.1

- both my phones were 11.2.1

- earlier I had added the ecobee3 on my phone and I was adding her using the home app but that use to give the error “the xxxxxx@gmail.com is not registered to iCloud” and when I tried to create a home at her iPad and add myself it use to say invitation pending but I will not receive anything. Once we had all 4. Devices on 11.2.1, I removed the home from my iPhone (as the iPad was on her Apple ID) and then converted her iPad to iHub and then added the ecobee3 thermostats to her device

- then I invited myself from her iPad and got the invitation instantaneously

Now I have all 4 devices with home kit having the ability to control the thermostats

Hope this works for you guys as well..

PS: I also turned keychain ON on all devices, not sure if that helped as well but I read in some blogs that for HomeKit you need to have this turned ON.

Good Luck

Great news: I just downloaded iOS 11.2.5 Beta 2 and the bug has FINALLY been fixed. No work-around (like inviting via a user’s iCloud email, which didn’t work for me) - it just works like it’s supposed to. I’m guessing the new iOS will be pushed out to everyone in the next few days.

I had the same issue but somehow I got it fixed.

My iPhone is the main HomeKit controller and my wife's iPhone is the guest.

1) Upgrade all devices to iOS11.2.1 (but this step alone won't work immediately)

2) Remove all guests from the main controller (in my case, its mine)

3) If you have any existing invitation to a guest, cancel it

4) In the other device that was once the guest (in my case, its my wife's phone), leave the "home". You can do this by going to the bottom of the home's setting page and tap on "Remove Home"

5) Send the invite again.

Hope this helps.

Thanks. I did exactly what you described to get it working. Only draw back is that my wife's phone is now the main controller and I'm a Guest in my own house!!

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<Personal Information Edited by Host>

Finally fixed this!!

1) Update all of your devices to 11.2.1 or higher

2) Go check under iMessages and see what your receiving "@icloud" account is. My wife's iTunes account email didn't match her @icloud account, sending an invite to @icloud one fixed the issue.

No more problems!

I found that if you are getting this error message even after upgrading to latest iOS, your guest might not have an @icloud account.

I went into iCloud and enabled Mail, created an @icloud.com account and bam it worked when I used that id.

I figured out the problem. If you are on the latest build (At least 11.2.1), the person you're trying to invite must have iCloud Keychain turned on. Settings->Your Name (above Airplane Mode)->iCloud->Keychain

Turn that on. Saw someone post a recommendation for alternative software that can issue invites, and in the app description it mentioned something about the iCloud keychain. I checked my GF's phone and yep, it was off. Turned it on, and the invite went through finally.

Just discovered this problem today and didn’t read anything until after trying to remove are reinvite my daughter. I am using iOS 11.2.5 and my daughter DOES have iCloud Keychain turned on, but am still getting the same message. It would appear that although changing that setting seemed to work for you, it is not “the problem.” was there any other changes or tweaks you made while troubleshooting this?

I think this was mentioned earlier in the thread....I was finally able to get an invite to work by using my wife’s cell phone number and not her email. The invite came across instantly and now she can see all the HomeKit devices. Now if iHome would get their cloud service fixed so Alexa would work.....

I was frustrated by the same issue. I was able to add 3 members to Homekit but could not add the 4th. Advice found in Google, YouTube, and on this site was of no help. I had been sending the invite unsuccessfully from my iPhone. I then try sending it from my IPad, and it worked flawlessly. I’m not sure why, both devices had the latest update. I hope this helps.

I fix my problem by deleting all the devices in Home on my iPhone X and then flipping to my wife’s iPhone X as the starting point. From her phone I then shared to me and was able to accept invitation. I then added devices to her phone and they showed up on mine. No idea why it didn’t work the other way around. I’ve been on and off the phone with Apple engineering for a week with no resolution. This was the only workaround I was able to find.

Perhaps this will save everybody the trouble of shenanigans with trying to fix this. Same issue with my gf, same dumb message...the solution? Went under privacy>HomeKit on her phone, nothing was enabled, enabled all of it, resent invite, worked immediately.

Wish I had of read this first. I removed my husband and now can’t add him back. He was only missing a couple of new lights I had installed.....now he has nothing! Hurry up Apple and fix this.

Even after upgrading to 11.2.1, I am still getting the error that my wife’s Apple ID is not registered… Anyone else having that problem?