Title: Authentication Problems
Last modified: February 10, 2019

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# Authentication Problems

 *  Plugin Author [hoernerfranz](https://wordpress.org/support/users/hoernerfranz/)
 * (@hoernerfranz)
 * [7 years, 3 months ago](https://wordpress.org/support/topic/authentication-problems-2/)
 * this is a short Note to those who encounter Problems with wp-caldav2ics not beeing
   able to login into their Caldav Server, see the currently 2 open Tickets here
   in the Support Forum.
    so, if you run into this issue, first make sure that: –
   the URL is correct, and points to your Calendar – Username + Password are correct
   if all is correct, and you still get messages like ‘Unauthorized’ in your Logfile,
   it might be a Problem with the Authentication Method your Server uses. Currently,
   wp-caldav2ics uses Basic Authorization, which works fine in most cases, but not
   all. To narrow down what might be the real cause, I recommend using [curl](https://curl.haxx.se/)
   as Test Tool, which is extremely versatile, see the [Manual Page](https://curl.haxx.se/docs/manpage.html).
   And yes, curl is available for all relevant OSes, even for Windows 😀 . Once 
   installed, you can fiddle around with your Setup by e.g. using this command: `
   curl -S --negotiate https://webmail.all-inkl.com/calendars/mycalendar -u testuser`
   which means you are trying to access your Calendar with Username ‘testuser’ and
   Auth Method ‘negotiate’. You should then be prompted for a Password, and if all
   is ok, there will be an appropriate Response. if not, something was wrong: URL,
   Username, Password or Auth Method … Then, just try other Combinations. Once you
   find a working Parameter set, which indicates the Auth Method ‘Basic’ as the 
   culprit, just open a new Ticket here and post your Findings.

The topic ‘Authentication Problems’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [hoernerfranz](https://wordpress.org/support/users/hoernerfranz/)
 * Last activity: [7 years, 3 months ago](https://wordpress.org/support/topic/authentication-problems-2/)
 * Status: not a support question