Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

icloud calendar to lightning works. Other way gets error and resets read only

  • 6 replies
  • 2 have this problem
  • 1 view
  • Last reply by rudeword

rudeword
rudeword
more options

I have added icloud calendar to Lightning as type ics. I have made the icloud calendar sharable privately and copied the URL into lightning. New icloud calendar entries show in Lightning. I have added an account for icloud email address into Thunderbird and that will send and receive emails OK. I have added the email address into the icloud calendar properties in Lightning. But when I add an entry to icloud calendar in Lightning I get the error: "This webpage is being redirected to a new location. Would you like the form data to be resent to this new location" Click OK and get: "An error occurred writing to the calendar icloud " with details: MODIFICATION_FAILED

This is with Lightning 3.3 and Thunderbird 31.1.1

I have looked around the net for recent problems/fixes/instructions but I haven't found anything that gets me past this. Any hints/fixes gratefully received. Rod

I have added icloud calendar to Lightning as type ics. I have made the icloud calendar sharable privately and copied the URL into lightning. New icloud calendar entries show in Lightning. I have added an account for icloud email address into Thunderbird and that will send and receive emails OK. I have added the email address into the icloud calendar properties in Lightning. But when I add an entry to icloud calendar in Lightning I get the error: "This webpage is being redirected to a new location. Would you like the form data to be resent to this new location" Click OK and get: "An error occurred writing to the calendar icloud " with details: MODIFICATION_FAILED This is with Lightning 3.3 and Thunderbird 31.1.1 I have looked around the net for recent problems/fixes/instructions but I haven't found anything that gets me past this. Any hints/fixes gratefully received. Rod

All Replies (6)

rudeword
rudeword Question owner
more options

So nobody else has this problem? Is there anyone out there that has Lightning calendar to icloud calendar working? If so, can they tell me what definitions they used, please. Pretty please. Rod

rudeword
rudeword Question owner
more options

OK I have some more info, mainly from a Harvard article at: http://computing.physics.harvard.edu/icloud which states that for one-way synch fro icloud to Lightning use ICS, but for two-way use caldav.

I have added a caldav calendar to Lightning but it doesn't work, saying the calendar is "momentarily unavailable". If I synch, all entries in Lightning are blanked, even my non-icloud ones, and I have to close and restart Thunderbird to display them again. I will test some more, but anyone else get past this point?

Matt
Matt
  • Moderator
  • Top 10 Contributor
more options

no idea if it will help http://blog.muehlbachler.org/2011/08/how-to-icloud-calendars-with-third-party-software/ but feedback appreciated.

rudeword
rudeword Question owner
more options

Thanks for the suggestion, Matt, but the blog is very old and things have moved on in both Thunderbird/Lightning and icloud since then.

I hope to have time to test some more this weekend.

jaapsoft
jaapsoft
more options

The calendar often just changes to read only, and no way to change that back. how come? add or change entry in calendar in lightning, and there is error message. calendar is changed to read only, changing that back does not help.

seems to me lightning is not (always) able to write to xxxx.ics file on URL.

rudeword
rudeword Question owner
more options

jaapsoft, as I discovered from the Harvard site I listed above, ICS is in one direction only. To get 2-way with updates from Lightning, you have to use CALDAV. The Harvard page explains how to define it, but I haven't got that to work yet either (but I still need time to test further). Rod