Unable to make changes to an existing Calendar entry

I have this Calendar entry with a reminder. Regretfully I can't change anything vĩ đại it, lượt thích setting Reminder: 0 hours.
Error "You cannot make changes vĩ đại contents of this read-only folder."

When checking it seems vĩ đại be something lượt thích a 'Shared folder'(??) or sánh.

To be honest, I have no idea where vĩ đại look and how vĩ đại solve this.
In case of need I could delete the entry and recreate a new one.

FWIW screenshot of Outlook Agenda

Possibly I am looking into the wrong direction though.

Outlook 365 (subscription)

Need vĩ đại add: I can -not- delete the entry.
Sorry for the confusion above, where I wrote "I could delete..."

That is the Your Family calendar - created automatically by Outlook.com when you share a subscription. It should be editable.... but only if you use the new calendar experience. (It's also editable in Outlook on the trang web.)

Go vĩ đại File > Account Settings > Account Settings. Double click on the trương mục and click More Settings. On the Advanced Tab, is Turn on shared calendar improvements enabled? If its enabled, you should be able vĩ đại edit it.

If you don't have the option, what is your build number and version?

Many thanks for the above. With má "Turn on shared calendar improvements" is -not- turned on.
I just turned it on. I am sharing my calendar with my wife's Outlook trương mục (obviously also 365).

Have waited a while now, but believe the error stays away now.

Super!
Thanks again Diane.

Did you restart Outlook? If that doesn't work, how is the calendar shared - look in the thư mục list (Ctrl+6) - is it showing as a subfolder of your calendar?

Sorry for the delay. Yes, I did restart Outlook and it seems okay now. The entry has been saved, which was not possible before.

It looks lượt thích this. A mixture of Dutch and English all within the same application

Uw gezin (=your family)

Does she have english version of office but have outlook.com language phối vĩ đại Dutch? That could trương mục for the family calendar name.

Ah, yes, I checked, that explains.
Hers is all English, thực đơn / folders, etc.

Thanks again!

Ref vĩ đại the above. Just for your info. Am using the Agenda also as kind of diary. Am adding old stuff vĩ đại it. Important things: when we moved vĩ đại a new house, bought a new things, when and where we went on vacation, etc. etc. All in the past.
Whilst doing sánh, there is a chance vĩ đại forget the phối the reminder vĩ đại 'None'.

So a reminder may pop up: xxx weeks overdue.

However, I can't change / delete the entry.

FWIW Found the workaround : have "Turn on shared calendar improvements" both turned OFF
relaunch Outlook, delete the entry and turn the option on again.

Had this problem again. Checking and unchecking and checking and unchecking "Turn on shared calendar improvements" - relaunching Outlook in between each time. No solution. Did a 'Repair' Office. No solution. This was driving má crazy.

Ultimately, I turned off again the option "Turn on shared calendar improvements".
Then went into Agenda (Calendar view), deleted the item.
Then I turned ON this option. For both accounts.

Frankly, I am not sure whether it is necessary for both accounts and neither tự I have any idea what the use is, what it is supposed vĩ đại 'improve'.

The calendar improvements are using the new calendar sync "experience"- for outlook.com, it gives you the ability vĩ đại edit the shared calendar.

FWIW only...

with "Turn on shared calendar improvements' turned ON
Discovered an easy way vĩ đại solve the above and applied this a few times already, with success.
1. Calendar > View > Change View > Select: Calendar (if not already selected)
2. R-click on the appointment and drag COPY it vĩ đại, for instance, the next day
3. Delete original
4. Move back the 'copied' appointment.

With má, usually it involves an appointment with a reminder. It shows up twice in the 'reminders' pop-up, likely because the Calendar is linked vĩ đại the one of my wife.
I can phối Reminder vĩ đại 'None' in 1 reminder. That will then disappear from the pop-up.
The other one is read only, which is removed using above steps.