[kontact] [Bug 416660] New: (Office 365) Entering any fields in an identity in kmail causes all recurring calendar items to disappear

[Lenon Kitchens]

https://bugs.kde.org/show_bug.cgi?id=416660

            Bug ID: 416660
           Summary: (Office 365) Entering any fields in an identity in
                    kmail causes all recurring calendar items to disappear
           Product: kontact
           Version: 5.13.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: mail
          Assignee: kdepim-bugs at kde.org
          Reporter: lenon.kitchens at gmail.com
  Target Milestone: ---

I selected kmail above, but this could be a korganizer bug.  I'm really not
sure.  I have reproduced it on Deepin, Ubuntu 19.10, 19.04, and 18.10, Kubuntu,
ArcoLinux, Manjaro, Solus, and maybe a couple of others.  I've distro hopped so
much due to this bug I can't really remember.

Kontact starts with an empty identity, meaning, no value in Name, Organization,
Email Address, or Email aliases.  If I connect to my Office 365 account and
retrieve all my mail and calendar items without modifying this identity,
everything is fine, with the obvious exceptions caused by not having an
identity with data in it (sending mail is pain because it doesn't know who the
mail is from, etc).

If I then fill in *any* data in my identity, I get several hundred message
boxes stating, "Error while trying to delete calendar item.  Error was: No
items found", and most of my calendar items disappear.  All of the ones that
disappear are recurring, the ones that stay on the calendar are not, but that
doesn't mean much because almost all of my calendar items *are* recurring.

If I fill in the identity information first before creating the Office 365
account, I don't get the popups, but I never get the recurring calendar items
in the first place.

I have verified that the data is still present via the akonadi console, and the
missing items can be recovered by renaming the identity that caused the issue,
creating a new one with empty fields, and clicking cancel in the "Edit
Identity" window, then deleting the original identity.

This bug effectively makes KMail a mail reader, since sending mail is too much
of a hassle with no identities defined.

Also, creating the accounts and identities in kmail as opposed to kontact has
the same effect, sans the message boxes.

STEPS TO REPRODUCE
1. Start Kontact with the default identity only.
2. Create a new receiver for an Office 365 account.
3. Verify that calendar items are present, and at least some are recurring.
4. Click Settings->Configure Kmail, select an identity and click Modify.  Enter
an email address.  Click Ok.
5. Close about a billion popups
6. Verify that calendar items are missing.

OBSERVED RESULT
Recurring calendar items are missing after filling out identity info.

EXPECTED RESULT
Calendar items should remain unchanged.


SOFTWARE/OS VERSIONS
Windows: 
None tested
macOS: 
None Tested
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.17.5
KDE Frameworks Version: 5.66.0
Qt Version: 5.14.0

ADDITIONAL INFORMATION

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