After updating to iOS 17, not able to sync data on iCloud (Advanced Data Protection has been set ON)

Solution 🤩 Finally! I just spent 50+ minutes on the phone with Apple, and I can confirm that agreeing to delete iCloud data will solve the problem and your data will remain intact.

The steps I took:

1) Click resume data sync.

2) When prompted for recovery passcode, select 'Can't Reach Recovery Contact'.

3) Select 'more information'.

4) Agree to delete the listed iCloud data. (In my case it was Messages, Health, and Safari)

5) At this point, I removed all recovery contacts listed.

6)The problem should be resolved and the resume data sync should no longer be there.

The above steps are the solution, but below are some of the other troubleshooting steps that we tried.

• I was also told at the start of troubleshooting to make sure VPN is switched off and remove any VPN profiles from the phone. General – VPN & Device Management.

• Sometimes a password-protected note could interrupt syncing.

• Try resuming the sync on cellular with the Wi-Fi off.

I was able to connect to my iCloud from windows pc, even from iphone via safari browser, but this didn’t change anything.

Finally I clicked that I can’t get my recovery code or I can’t reach my recovery contact (don’t remember exactly) and the popup showed that it resets my keychain, I clicked yes and everything started working, nothing was reseted or deleted.

My Iphone 13 did the same. I just now signed out of Icloud and back in, and it fixed the issue for me.

Mine started to work after updating to 17.1, then giving it some time. Restart your iPhone as well.

I signed out and back in and the icloud sync message is gone! However, the main reason I did this update is to get a Find my Friends invitation to follow our new airtags (that my wife set up). For some reason I still cannot get the invite even though she sent it several times. again it seems to be related to this latest 17.0.3 update. if you or anyone else have any suggestions for that, I'd appreciate it. My son did the update and received the invitation without problems. thanks.

Since I updated to iOS 17 (now 17.0.3), I have the same issue with my iPhone 12 — but now limited to Contacts.

I tried everything. Toggle the Contact button in iCloud settings on the phone, rebooting, deleting everything then resetting the phone to factory and reinstalling. To no avail. It’s been a week and my Contacts are still 0.

it would seem that Apple rushed this update with iCloud backward compatibility issues for earlier phone model (the problems seem limited to iPhone 11, 12, maybe 13).

I am going to disable all advanced security option and see if that helps:

Turned off Private Relay and Advanced Data Protection. Rebooted the phone OS (turned off then back on). I went to Settings, iCloud and toggled the Contacts button off ….. and the Settings app crashed and closed.

Settings should not crashed. There is really something fishy with iCloud and iOS 17.0.2/17.0.3.

i reopened Settings (after it crashed) and toggled Contacts back on. In the Contacts settings, sync is set to Push and Automatic. Now waiting to see if sync starts. So far, still 0 (I have over 1,600 contacts on my MBP).

Same issue on my SE. I have ios 17.2.1. Just got off phone with support. Was on with them about 30 minutes. First rep tried some things - no help. Transferred to another rep that figured out how to resolve. I can't recall for sure everything he had me do, but I had to set up passcode for the phone (i don't lock my phone) and then I think he had me do "sync this iphone" from Settings\My name\icloud\passwords and keychain. There may have been a step where I had to turn on "Access icloud data on the web" (I normally have that off also). Just not sure because he had me try a number of things (sorry). Then went back to Settings and I think that little annoying message was gone or it was there and clicked on it and the "resume date sync" which then clearned the message. I then went back and turned off those things that I normally have off but I had to turn on to get all this done. If the above is not quite right, perhaps it will point you in right direction. At least Apple support was able to resolve the issue if you need to call them as last resort.

Log into iCloud.com and see if you can poke it a bit. If not, try creating a new Note, and see if it shows up. Then sign out, then back into your account on your phone.

AHa - thanks to reading other replies here I stumbled into the fix for me. Runing iOS 17.0.2 (upgraded from 16.3 two nights ago) and noticed last night photos taken with the iPhone SE (gen 3) were not appearing on the MacBook photos program. But when I went to the Settings-->Apple ID-->iCloud screen it immediately informed me I had to agree to the terms and conditions (apparently big brother wants to be bigger) - after dutifully complying the sync proceeded, even as I type this note. So, there's that.