Unable to sync Calendar App after iOS 18 update

Any updates on this? Same issue on my iPhone 16 pro max. Have done everything possible with corporate IT, and I’ve reset the network settings on iPhone. Exchange calendar still does not sync with iPhone native Calendar or third party apps. Agree that is difficult to keep 2 calendars without double booking or missing meetings. Frustrating since this is a new problem that I haven’t had in the 8-10 years using the same setup.

This is clearly a widespread issue, reading comments on multiple sites (here, Reddit, Microsoft).

Any update? Less than a handful of items will load on my calendar. I’ve checked my settings. Help!

Same here, since updating to IOS18, all of my calender entries have disappeared and when I try to restore them from my Icloud there are no calender events there either. Everything else is backed up, my notes, my photos, it's all there, just the calender is empty - it says no archives available. I am freaking out, it had ALL of my appointments and I have no idea what to do now. Help please

Im having the exact same issue yall, has apple fixed this yet? 🤬

We are having the same issue on my husband’s phone! He tried creating a new calendar and moving everything to that calendar and it had the same issue! But it isn’t affecting any other family member’s calendar. This is BEYOND frustrating because we are missing business meetings!!!

Me, too, and I am so so so very very unhappy ever since doing a Software Update to my iPhone 13 which is not even a year old. I never called Apple to ask for support to do an Update.

This Customer Support person Lisa instructed me to do this Software Update without warning me what would happen after the Software Update which I soon learned the Software Update was the IOS 18.0.1 and now I LOST ALL my contacts and my past present and future calendar appointments.

Now, they tell me they cannot help me to restore or recover my CONTACTS and my CALENDAR.

Apple Customer Support FAILED

Me, too! I have a “New” iPhone 13 which is not even a year old and …

Apple Customer Support actually misinformed me by instructing me to do a Software Update 18.0.1 and DID NOT warn me that I would loose my CONTACTS and my CALENDAR.

Now, I desperately need Apple Customer Support which appears to be non-existent to recover my CONTACTS and my CALENDAR.

Same issues for me. Now, I am so very upset as lost ALL my Contacts and ALL my past present and future Calendar appointments simply because without any warning of the consequences was I instructed by the Apple Customer Support “Lisa” to do this UNACCEPTABLE Software Update 18.0.1 😭

I DID have success with contacts, finally. From settings / contacts / contact accounts / exchange, uncheck contacts. Then force a reset of the phone and when it comes back online navigate back to the same place and re-check contacts. THEN on the contacts settings scroll down and change default account to exchange. Now when you go to contacts / lists you should see exchange and your contacts populating. I’ve got 3300 contacts it was fun to watch the number of contacts grow until it was done and now I’m ok. While the calendar issue is SO frustrating and apple support acts like I am the only one with the issue, It just has to be an ios18 issue and fingers crossed it will get resolved with the new AI update at the end of the month.

Since updating to IOS 18, all my calendar entries have disappeared. I don’t even have bank/public hols either. Any update from Apple how to fix this?

Same here. I quit all calendars on devices thinking they would update. Not only no sync now I have lost dates.

I use google calendar for work and 2 businesses. Since the IOS 18 update, my entire Google Calendar has gone blank. I am beyond lost and ready to explode 🤬🤬🤬

I don't see any reply from Apple. Am I missing it?? Same issue. Impacting my business

I logged into my google calendar via web browser and then went back in via the app and it had synced everything.

haven't tried to add any events yet to see if it automatically syncs.🤷🏻